Umeå University's logo

umu.sePublications
Change search
Refine search result
1234567 1 - 50 of 695
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Aasa, Björn
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Orthopaedics. Norrlandsklinikens hälsocentral, Umeå, Sweden.
    Berglund, Lars
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy. Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Orthopaedics.
    Michaelson, Peter
    Luleå Tekniska Universitet, Institutionen för hälsovetenskap, Avdelningen för hälsa och rehabilitering, Fysioterapi.
    Aasa, Ulrika
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
    Individualized low-load motor control exercises and education versus a high-load lifting exercise and education to improve activity, pain intensity, and physical performance in patients with low back pain: a randomized controlled trial2015In: Journal of Orthopaedic and Sports Physical Therapy, ISSN 0190-6011, E-ISSN 1938-1344, Vol. 45, no 2, p. 77-85Article in journal (Refereed)
    Abstract [en]

    Study Design Randomized controlled trial. Background Low back pain is a common disorder. Patients with low back pain frequently have aberrant and pain-provocative movement patterns that often are addressed with motor control exercises. Objective To compare the effects of low-load motor control (LMC) exercise and those of a high-load lifting (HLL) exercise. Methods Seventy participants with recurrent low back pain, who were diagnosed with nociceptive mechanical pain as their dominating pain pattern, were randomized to either LMC or HLL exercise treatments. Participants were offered 12 treatment sessions over an 8-week period. All participants were also provided with education regarding pain mechanisms. Methods Participants were assessed prior to and following treatment. The primary outcome measures were activity (the Patient-Specific Functional Scale) and average pain intensity over the last 7 days (visual analog scale). The secondary outcome measure was a physical performance test battery that included 1 strength, 3 endurance, and 7 movement control tests for the lumbopelvic region. Results Both interventions resulted in significant within-group improvements in pain intensity, strength, and endurance. The LMC group showed significantly greater improvement on the Patient-Specific Functional Scale (4.2 points) compared with the HLL group (2.5 points) (P<.001). There were no significant between-group differences in pain intensity (P = .505), strength, and 1 of the 3 endurance tests. However, the LMC group showed an increase (from 2.9 to 5.9) on the movement control test subscale, whereas the HLL group showed no change (from 3.9 to 3.1) (P<.001). Conclusion An LMC intervention may result in superior outcomes in activity, movement control, and muscle endurance compared to an HLL intervention, but not in pain intensity, strength, or endurance.

  • 2.
    Aasa, Ulrika
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation. Umeå University, Faculty of Social Sciences, Umeå School of Sport Sciences.
    Berglund, Lars
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation. Umeå University, Faculty of Social Sciences, Umeå School of Sport Sciences.
    A descriptive analysis of functional impairments and patho-anatomical findings in eight powerlifters2020In: Journal of Sports Medicine and Physical Fitness, ISSN 0022-4707, E-ISSN 1827-1928, Vol. 60, no 4, p. 582-593Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Low back pain (LBP) is a common pain problem in powerlifters. There is a lack of evidence to guide powerlifters and health-care professionals in understanding the role of powerlifting in the development of LBP and treatment of injuries in powerlifters. This study aimed to describe functional impairments and patho-anatomical findings in eight powerlifters with and without LBP. METHODS: First, four powerlifters with LBP were recruited. Each powerlifter was then matched with a pain-free lifter (Control) by age, Body Mass Index and competition weight class. They all performed physical performance tests and were examined with magnetic resonance imaging. Four weeks prior to the examination the powerlifters also recorded training load. Powerlifters with LBP were also examined by a physiotherapist in order to define their pain and impairments. RESULTS: The four male powerlifters with LBP had a nociceptive pain associated with non-ideal squatting technique, higher flexibility in their lumbar spine than in their hips and patho-anatomical findings such as degenerated discs (four), spondylolysis (one) and spinal stenosis (one). However, the controls also showed similar functional impairments and patho-anatomical findings. CONCLUSIONS: Powerlifters with and without LBP show similar functional impairments and patho-anatomical findings. However, powerlifters' LBP seems associated with pain during movement and loading of the lumbar spine. The association and causation between specific functional impairments, patho-anatomical findings and LBP in powerlifters has to be further investigated in studies including more participants.

  • 3.
    Aasa, Ulrika
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Physiotherapy.
    Paulin, Johan
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Madison, Guy
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Correspondence between physical self-concept and participation in, and fitness change after, bi-weekly body conditioning classes in sedentary women2017In: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 31, no 2, p. 451-461Article in journal (Refereed)
    Abstract [en]

    The aims of the study were (1) to investigate the effects of participation in low impact body conditioning classes on physical fitness in sedentary women at different ages and (2) to examine the correspondence between physical self-concept and participation in, and fitness change after, the participation. Ninety-two sedentary women (mean age 44.2 years) participated in 11-weeks of bi-weekly classes that included cardiovascular, strength, core, endurance and mobility exercises, all performed in synchrony with music. Cardiorespiratory fitness, maximal lifting strength, mobility and balance tests were performed pre- and post the exercise period and the short-form Physical Self-Description Questionnaire (PSDQ-S) was completed. Zero-order Spearman correlation analyses showed that women who rated the PSDQ-S dimension Sport competence higher participated in a larger number of sessions (rs=0.24, p=0.040). At post-tests, all participants had increased their balance, the participants aged 20-34 years had increased their lifting strength, and the participants aged 35-65 years had increased their cardiorespiratory fitness and mobility. Most PSDQ-S dimensions did not affect performance change, but the perception of being physically active was related to increased cardiovascular fitness. We conclude that women with a sedentary lifestyle who wish to increase their physical capacity benefit from music exercise and that inquiries about perceived sport competence and physical activity can improve recommendations made by strength and conditioning professionals.

  • 4. Abat, F
    et al.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine. Alfredson Tendon Clinic Inc, Umeå, Sweden; Pure Sports Medicine Clinic, ISEH, UCLH, London, UK.
    Cucchiarini, M
    Madry, H
    Marmotti, A
    Mouton, C
    Oliveira, J M
    Pereira, H
    Peretti, G M
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Stephen, J
    van Bergen, C J A
    de Girolamo, L
    Current trends in tendinopathy: consensus of the ESSKA basic science committee. Part II2018In: Journal of experimental orthopaedics, ISSN 2197-1153, Vol. 5, no 38Article in journal (Refereed)
    Abstract [en]

    The treatment of painful chronic tendinopathy is challenging. Multiple non-invasive and tendon-invasive methods are used. When traditional non-invasive treatments fail, the injections of platelet-rich plasma autologous blood or cortisone have become increasingly favored. However, there is little scientific evidence from human studies supporting injection treatment. As the last resort, intra- or peritendinous open or endoscopic surgery are employed even though these also show varying results. This ESSKA basic science committee current concepts review follows the first part on the biology, biomechanics and anatomy of tendinopathies, to provide a comprehensive overview of the latest treatment options for tendinopathy as reported in the literature.

    Download full text (pdf)
    fulltext
  • 5.
    Abat, Ferran
    et al.
    ReSport Clinic Barcelona, Blanquerna-Ramon Llull University School of Health Science, Rosselló, Barcelona, Spain.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Sonosurgery ultrasound-guided arthroscopic shaving for the treatment of patellar tendinopathy when conservative treatment fails2023In: Anterior knee pain and patellar instability / [ed] Vicente Sanchis-Alfonso, Cham: Springer Nature, 2023, 3, p. 403-413Chapter in book (Refereed)
    Abstract [en]

    Proximal patellar Tendinopathy, commonly denominated as Jumper´s Knee, is widely considered to be a challenge to treat (Abat et al. in J Exp Orthop. 3:34, 2016). The treatment of patellar tendinopathy focuses on reducing if not eliminating the pain and improving function. At present, there are a several distinct treatments oriented to that end, and a “gold-standard” treatment might be in sight. (Abat F, Alfredson H, Cucchiarini M, Madry H, Marmotti A, Mouton C, Oliveira JM, Pereira H, Peretti GM, Spang C, Stephen J, van Bergen CJA, de Girolamo L. Current trends in tendinopathy: consensus of the ESSKA basic science committee. Part II: treatment options. J Exp Orthop. 2018 Sep 24;5(1):38. https://doi.org/10.1186/s40634-018-0145-5.)

  • 6.
    Abat, Ferran
    et al.
    Department of Sports Orthopaedic, ReSport Clinic Barcelona, Barcelona, Spain.
    Maffulli, Nicola
    Centre for Sports and Exercise Medicine, Queen Mary University of London Barts and The London School of Medicine, London, United Kingdom.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Lopez-Vidriero, E.
    Department of Orthopaedic, International Sports Medicine Clinic and Ibermutuamur Sevilla, Sevilla, Spain.
    Myers, C.
    Complete Physio, Tendon Performance, Sports Medicine Ultrasound Group (SMUG), London, United Kingdom.
    Gomes, S.
    Department of MSK Radiology, Clinica do Dragao Espregueira Mendes Sports Centre – FIFA Medical Centre of Excellence, Porto, Portugal.
    Chan, O.
    Department of MSK Radiology, BMI London Independent Hospital, London, United Kingdom.
    Clinical utility of diagnostic ultrasound in athletes with tendinopathy (ICL 22)2016In: Esska instructional course lecture book: Barcelona 2016 / [ed] Roland Becker; Gino M.M.J. Kerkhoffs; Pablo E. Gelber; Matteo Denti; Romain Seil, Springer Berlin/Heidelberg, 2016, p. 217-223Chapter in book (Refereed)
    Abstract [en]

    Chronic painful tendinopathy is common in elite and recreational athletes and in sedentary subjects; all may have to stop or decrease their level of physical activity [1, 2]. Midportion Achilles tendinopathy and for the younger and heavy loading population also patellar tendinopathy are problematic injuries. However, recent research on innervation patterns histopathology and pain mechanisms in Achilles and patellar tendons has led to an increased knowledge about the chronic painful tendon [3–6].

  • 7.
    Adam, Eriksson
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Victoria, Olofsson
    Smålagsspel för unga fotbollsspelare: yttre fysisk belastning och motivation.2021Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Soccer is a high intensity sport with intermittent work that puts high demands on aerobic ability. To develop the aerobic ability for soccer players it’s common to use small sided games (SSG). The training method resembles a real match but is played on a smaller area with fewer players. In a sports context, previous research shows a connection between internal motivation and greater perceived happiness to the activity, as well as perseverance in performing activities at hand. This may affect the athlete's development and performance. This study compared the external load (Total distance (TD), sprints (SL), high speed running (HHL), accelerations (ACC) and decelerations (DEC) in SSG between different pitch sizes and number of players. Furthermore it was studied whether there was a difference between the motivation and sizes and whether there was a correlation between motivation and external load. Seventeen soccer players (18 ± 1 years) from a soccerc academy participated in the study. Global Positioning System data were collected from the Polar Team Pro application, allocated from the football club. SSG pitch sizes were 7vs7; 50m x 35-45m, 4vs4; 32m x 20m. TD were longer in SSG 7vs7 than in SSG 4vs4 (p <0.05), players made more accelerations (p <0.05) and decelerations (p <0.05) in SSG 7vs7. A survey based on the Situational Motivation Scale (SIMS) was used to measure the players' form of motivation; Internal motivation, identified regulation, external regulation and amotivation. The results showed no significant differences between SSG 7vs7 and SSG 4vs4 for the motivation forms. The results showed a significant negative correlation between amtoviation and TD in SSG 7vs7, and in identified regulation and SL in SSG 7vs7. This study shows that different layouts of SSG affect the external load of young soccer players in different ways and that the players’ motivation can affect the outcome of training and development. More research is needed on young soccer players to ensure reliable results. 

    Download full text (pdf)
    fulltext
  • 8.
    Aghababa, Alireza
    et al.
    Sport Psychology Department, Sport Sciences Research Institute, Tehran, Iran.
    Rohani, Hadi
    Exercise Physiology Department, Sport Sciences Research Institute, Tehran, Iran.
    Nabilpoor, Maghsood
    Sport Sciences, International University, Qazvin, Iran.
    Theos, Apostolos
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Derek, Kingsley
    Exercise Physiology Department, Cardiovascular Dynamics Laboratory, Ohio, United States.
    Shahidi, Seyed Houtan
    Sport Coaching Department, Gedik University, İstanbul, Turkey.
    Effects of COVID-19 on physical activity and mood in the middle-aged people: Concerns and strategies2022In: Turkish Journal of Sports Medicine, ISSN 1300-0551, Vol. 57, no 1, p. 38-43Article in journal (Refereed)
    Abstract [en]

    Objective: To assess the impact of coronavirus on the physical activity levels before and during self-quarantine, and the effect of self-isolation on the total mood status of Iranian citizens during the covid-19 pandemic. 

    Material and Methods: A national sample of 2359 middle-aged (M age=42.8±5.3 years, n=1183,50.1%, male; n=1148, 48.7% female) Iranian completed an online questionnaire that assessed changes in daily physical activity behavior and mood status from March 20th to April 20th, 2020. The questionnaire implemented to collect the total duration, intensity, and frequency of physical activity and their psychological mood condition via the BRUMS Mood Scale.

    Results: There were significant differences between physical activity frequency, duration, and intensity before and during the coronavirus pandemic. There was no significant difference between the total mood conditions between the sex categories. The main key finding of the current study is that the total physical activity participation behavior of our middle-aged populations has decreased meaningfully.

    Conclusion: The present study has provided important approaches that should be implemented to promote the engagement of middle-aged adults in physical activity. Therefore, based on scientific evidence, maintaining a regular physical activity routine regarding world health organization guidelines is a key strategy for physical health.

    Download full text (pdf)
    fulltext
  • 9.
    Agvald, Liv
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Fysisk aktivitetsnivå hos barn i årskurs 3: En accelerometerstudie2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Introduction: The importance of physical activity is well investigated, but the knowledge regarding the physical activity of younger children is limited. Accelerometers have proved to be a valid method to measure physical activity in children.

    Purpose: The purpose of this study was to investigate the total level of physical activity (relative to recommended level) in children in grade three at a school in northern Sweden. Furthermore, the study investigated whether there are any differences in physical activity based on gender or participation in organized sports.

    Method: Forty children participated in the study. Their level of physical activity was measured using tri-accelerometry technology during one week. Each participant also completed a short questionnaire regarding their level of physical activity.

    Results: No significant difference was found in the level of physical activity in relation to gender or participation in organized sports. All but one participant reached the recommended level of daily activity.

    Discussion: Based on the study, children in grade three appear to be sufficiently active to achieve the daily level of activity, a positive result in spite of the alarming reports of increased sedentary behavior among children. Intensified studies are needed to see if these results recur in a broader context.

    Download full text (pdf)
    fulltext
  • 10.
    Ahlsved, Kaj
    Umeå University, Faculty of Arts, Department of culture and media studies. Åbo Akademi, Åbo, Finland.
    Velocipedmusik från stålhästens decennium - hur lät den?2023In: Toiminta soi, ISSN 2737-016XArticle in journal (Other (popular science, discussion, etc.))
    Abstract [sv]

    På 1890-talet var intresset för cykling stort i Finland. Intresset avspeglades även i musikkulturen eftersom det började komponeras musik med cykeltema. Endast en liten del av den musiken har getts ut kommersiellt i Finland. Kaj Ahlsved har grävt i arkiven och i samarbete med musiker levandegjort musiken så som den finns nertecknad i version för hornensemble i Finlands armés stämböcker. Hur lät ”cykelmusiken”, vem komponerade den och varför?  

  • 11.
    Albertsson, Sandra
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Juntunen, Martin
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Styrketräningsadaption: Aminosyrafördelning och intracellulär signalering2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Muscle mass regulation is responsive to a variety of stimuli, whereas amino acids and resistance exercise are two major regulators. Protein accretion occurs when the rate of protein synthesis exceeds the rate of protein degradation. It has long been recognized that both amino acid and resistance exercise effect protein synthesis and protein degradation, although the effect of varying distribution of amino acids remain unknown. The intracellular pathways by which protein synthesis are activated is complex. The purpose of this essay is to elucidate if there exist any scientific rationale to spread the amino acid intake over the day, with the purpose to maximize muscle protein accretion in response to resistance exercise. Furthermore , we intend to describe how amino acids and resistance exercise effect the molecular pathways that regulate protein synthesis, with the main focus on pathways that activate and are activated by mTOR.

    Studies that examine acute effects on protein synthesis or protein balance after resistance exercise and amino acid intake support the notion that there may be an advantage to spread the amino acid intake over the day, since the synthetic response to amino acids are transient. However, studies examining the effect of different meal frequencies on protein accretion and /or training results fail to support this notion. Both amino acids and resistance exercise seems to independently activate the intracellular pathways that regulate protein synthesis, with the effect being greatest when both are combined. The regulation also seems to be dependent on exercise intensity and volume, age of test subjects, contraction type and muscle fiber type. Furthermore, some researchers have found correlations between activation of these pathways and resistance exercise-induced muscle gain and strength gain.

  • 12.
    Alfredson, Hakan
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). ISEH, UCLH, London, UK.
    Persistent pain in the Achilles midportion?: Consider the plantaris tendon as a possible culprit!2017In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 51, no 10, p. 833-834Article, review/survey (Refereed)
  • 13.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine. Alfredson Tendon Clinic Inc., Umeå, Sweden; Pure Sports Medicine, London, England.
    Achilles and patellar tendon operations performed in local anestesia2018In: American journal of Anesthesiology and Pain medicine, ISSN 2640-5377, Vol. 1, no 1, p. 001-002Article in journal (Refereed)
    Abstract [en]

    From 20 years of research on innervation patterns and pain mechanisms in chronic painful Achilles and patellar tendinopathy, we have learned that the nerves are located outside the affected tendon. With this background we use local anestetics in combination with Adrenaline when these patients are surgical treated. We have now more than 15 years of experience in treating Achilles tendinopathy, and 10 years of experience in treating patellar tendinopaty, in local anesthesia alone. I will present the scientific background and practi-cal techniques to use local anesthesia for treatment of chronic painful Achilles and patellar tendinopathy.

    Download full text (pdf)
    fulltext
  • 14.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Can specific treatment prevent progressive tendon degeneration?2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 4, p. 334-Article in journal (Refereed)
    Abstract [en]

    Background Tendon degeneration is generally believed to be irreversible.

    Objective To use ultrasound to study the Achilles midportion tendon structure and thickness before and after treatment of chronic painful tendinosis.

    Design Prospective study.

    Patients and interventions Middle aged patients on varying activity levels, having midportion chronic Achilles tendinosis, were followed with ultrasound examinations before and after treatment with eccentric training, sclerosing polidocanol injections and surgical scraping.

    Outcome measurements Tendon thickness and structure.

    Results 89 patients successfully treated (pain-free during tendon loading) with eccentric training (n=22), sclerosing polidocanol injections (n=38) and surgical scraping (n=29), had a significantly thinner Achilles midportion and a more normal tendon structure, after compared to before, treatment.

    Conclusion For the Achilles midportion, tendon degeneration might not be irreversible. The findings indicate a possible regeneration potential.

  • 15.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Eccentric calf muscle training: the story2010In: Sportverletzung, Sportschaden, ISSN 0932-0555, E-ISSN 1439-1236, Vol. 24, no 4, p. 188-189Article in journal (Refereed)
  • 16.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation. 2Institute of Sport, Exercise and Health, University College London Hospitals, London, UK.
    Low recurrence rate after mini surgery outside the tendon combined with short rehabilitation in patients with midportion Achilles tendinopathy2016In: Open Access Journal of Sports Medicine, E-ISSN 1179-1543, Vol. 7, p. 51-54Article in journal (Refereed)
    Abstract [en]

    Background: There is a general opinion that a structured and specific rehabilitation is needed after treatment of midportion Achilles tendinopathy to minimize recurrence of the condition. There is sparse knowledge about the recurrence rates in large patient materials after specific treatments for midportion Achilles tendinopathy.

    Aim: This study aimed to investigate the recurrence rates in a large number of patients with chronic painful midportion Achilles tendinopathy that had been surgically treated with the ultrasound (US) and Doppler (DP)-guided mini-surgical scraping technique. Postoperatively, a relatively simple rehabilitation protocol, including a range of movement exercises and gradually increased walking and biking before allowing free activity, was used.

    Materials and methods: From a database, information about the recurrence rates after US + DP-guided mini-surgical scraping, performed by a single surgeon on 519 tendons with US + DP-verified chronic painful midportion Achilles tendinopathy, was obtained.

    Results: Recurrence of painful midportion Achilles tendinopathy was found in 26 of 519 (5%) operated tendons, 13 from women and 13 from men. In 13 tendons, a close by located plantaris tendon was extirpated during the reoperation.

    Conclusion: In this large material on patients treated with US + DP-guided mini-surgical scraping for midportion Achilles tendinopathy, there were few recurrences, although only a simple and nonspecific rehabilitation protocol was used.

    Download full text (pdf)
    fulltext
  • 17.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Midportion Achilles tendinosis and the plantaris tendon2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 13, p. 1023-1025Article in journal (Refereed)
    Abstract [en]

    Objectives: When re-operating patients with midportion Achilles tendinosis, having had a poor effect of ultrasound (US) and Doppler-guided scraping, the author found the involvement of the plantaris tendon to be a likely reason for the poor result. The aim of this study was to investigate the occurrence of a plantaris tendon in close relation to the Achilles tendon in consecutive patients with midportion Achilles tendinosis undergoing treatment with US and Doppler-guided scraping.

    Material and methods: This study includes 73 consecutive tendons with chronic painful midportion Achilles tendinosis, where US+Doppler examination showed thickening, irregular tendon structure, hypo-echoic regions, and localised high blood flow outside and inside the ventral Achilles midportion. The tendons were treated with US+Doppler-guided scraping, via a medial incision. If there was a plantaris tendon located in close relation to the medial Achilles, it was extirpated.

    Results: An invaginated, or ‘close by located’, enlarged plantaris tendon was found in 58 of 73 (80%) tendons. Preliminary clinical results of the combined procedure, US + Doppler-guided surgical scraping and extirpation of the plantaris tendon, are very promising.

    Conclusions: A thickened plantaris tendon located in close relation to the medial Achilles seems common in patients with chronic painful midportion tendinosis. The role of the plantaris tendon in midportion Achilles tendinosis needs to be further evaluated and should be kept in mind when treating this condition.

  • 18.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Reply to the letter from Dr. Karsten Knobloch regarding our article "Sclerosing injections to treat midportion Achilles tendinosis: a randomized controlled study evaluating two different concentrations of polidocanol"2009In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347, Vol. 17, no 1, p. 113-114Article in journal (Other academic)
  • 19.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine. National Institute for Working Life, University of Umeå , 901 87, Umeå, Sweden .
    Strategies in treatment of tendon overuse injury. The chronic painful tendon.2006In: European Journal of Sport Science, ISSN 1746-1391, E-ISSN 1536-7290, Vol. 6, no 2, p. 81-85Article in journal (Refereed)
    Abstract [en]

    The etiology and pathogenesis to chronic tendon pain is unknown, and treatment is known to be difficult. Treatment is often based on opinions and not findings in scientific studies. Recent research, using the intra-tendinous microdialysis technique, has shown that in chronic painful Achilles-, patellar-, and extensor carpi radialis brevis (ECRB) tendons, there were no signs (normal Prostaglandin-2 levels) of a so-called chemical inflammation. Furthermore, in biopsies from chronic painful Achilles tendons, pro-inflammatory cytokines were not up-regulated, again showing the absence of an intra-tendinous inflammation. Consequently, if the purpose is to treat a chemical inflammation, there is no science backing up for treatment of theses conditions with anti-inflammatory agents (NSAIDs, corticosteroidal injections). Interestingly, Substance-P (SP) and Calcitonin Gene Regulated Peptide (CGRP) nerves have been demonstrated in close relation to vessels in biopsies from these chronic painful tendons, indicating the existence of a possible so-called neurogenic inflammation. Using ultrasonography (US) + color Doppler (CD), and immunhistochemical analyses of biopsies, a vasculo/neural (SP- and CGRP-nerves) ingrowth in the chronic painful tendinosis tendon, but not in the pain-free normal tendon, has recently been found. A specially designed treatment, using US- and CD-guided injections of the sclerosing agent Polidocanol, targeting the neovessels outside the tendon, has in pilot studies on chronic painful Achilles-, and patellar tendons been shown to cure the tendon pain in the majority of patients. A recent randomized double-blind study, verified the importance of injecting the sclerosing substance Polidocanol.

  • 20.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Ultrasound and Doppler-guided mini-surgery to treat midportion Achilles tendinosis: results of a large material and a randomised study comparing two scraping techniques.2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 5, p. 407-410Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Treatment based on ultrasound (US) and colour Doppler (CD) findings in midportion Achilles tendinosis has shown promising results. In a randomised study on a small patient material, similar short-term clinical results were demonstrated with surgery outside the tendon and sclerosing polidocanol injections, but surgical treatment led to a faster return to activity.

    OBJECTIVE: To evaluate the clinical results of US and CD-guided mini-surgery (scraping) outside the ventral tendon in a larger patient material and, in a randomised study, compare two different techniques for surgical scraping.

    MATERIAL AND METHODS: 103 patients (66 men, 37 women), mean age 43 years (range 24-77), with midportion tendinosis in 125 Achilles tendons were included. Patients from a large group (88 tendons), and a randomised study (37 tendons), were in local anaesthesia treated with a US and CD-guided new surgical approach outside the ventral tendon. All patients in the large group, and one arm of the randomised study, were treated open with a scalpel, while the other arm of the randomised study were treated percutaneously. Pain during Achilles tendon loading activity (Visual Analogue Scale (VAS)), and satisfaction with treatment, were evaluated.

    RESULTS: Before surgery, the mean VAS was 73. After surgery (follow-up mean 18 months, range 6-33), the mean VAS was 3 in 111 tendons (89%) from satisfied patients back in full Achilles tendon loading activity. In the randomised study, there were no significant differences in the results between open treatment with a scalpel and percutaneous treatment with a needle.

    CONCLUSIONS: US and CD-guided scraping show good short-term results in midportion Achilles tendinosis.

  • 21.
    Alfredson, Håkan
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Where to now with Achilles tendon treatment?2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 5, p. 386-386Article in journal (Refereed)
  • 22.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Masci, Lorenzo
    Institute of Sports Exercise and Health, University College Hospital London, London, United Kingdom; Sports & Exercise Medicine, Queen Mary University of London, London, United Kingdom.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Private Orthopaedic Spine Center, Würzburg, Germany.
    Is There a Relationship Between Quadriceps Tendinopathy and Suprapatellar Plica? An Observational Case Series2022In: International Medical Case Reports Journal, E-ISSN 1179-142X, Vol. 15, p. 81-84Article in journal (Refereed)
    Abstract [en]

    Purpose: Chronic painful quadriceps tendinopathy is a relatively rare condition known to be difficult to manage. Conservative management is first-line treatment and if that fails open intra-tendinous revision surgery followed by a long rehabilitation period is used. There is sparse research on etiology and new treatment methods. This observational study aimed to evaluate the intra-articular findings in patients with chronic painful quadriceps tendinopathy resistant to conservative management.

    Patients and Methods: Seven male athletes (mean age 33 years, range 22–40) suffering from chronic painful quadriceps tendinopathy in altogether 10 tendons, not responding to conservative management including heavy strength training, were included. Clinical examination and ultrasound scanning were used for diagnosis. Arthroscopy was used for evaluation of the inside of the knee.

    Results: In all 10 knees, there were obliterating major plica formations in the suprapatellar pouch.

    Conclusion: Obliterating plica formations in the suprapatellar pouch may be involved in the aetiology and pathology in quadriceps tendinopathy.

    Download full text (pdf)
    fulltext
  • 23.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine. Institute of Sports Exercise and Health, University College Hospital London, London, United Kingdom.
    Masci, Lorenzo
    Institute of Sports Exercise and Health, University College Hospital London, London, United Kingdom; Sports and Exercise Medicine, Queen Mary University of London, London, United Kingdom.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Private Orthopaedic Spine Center Dr. Alfen, Würzburg, Germany.
    Sharp pain in a normal Achilles tendon of a professional female football player was related to a plantaris tendon in a rare position: a case report2021In: Journal of Medical Case Reports, E-ISSN 1752-1947, Vol. 15, no 1, article id 513Article in journal (Refereed)
    Abstract [en]

    Background: Plantaris tendinopathy and plantaris-associated Achilles tendinopathy can be responsible for chronic pain in the Achilles tendon midportion, often accompanied by medial tenderness. As conservative treatments are less successful for this patient group, proper diagnosis is important for decision making. This report presents a case with plantaris tendinopathy in a rare (superficial) location.

    Case presentation: This article describes a pain history and treatment timeline of a professional Swedish female soccer player (32 years old, Northern European ethnicity, white) who suffered from sharp pain in the Achilles tendon midportion and tenderness on the medial and superficial side for about 2 years. Conservative treatments, including eccentric exercises, were not successful and, to some extent, even caused additional irritation in that region. Ultrasound showed a wide and thick plantaris tendon located on the superficial side of the Achilles tendon midportion. The patient was surgically treated with local removal of the plantaris tendon. After surgery there was a relatively quick (4–6 weeks) rehabilitation, with immediate weight bearing, gradual increased loading, and return to running activities after 4 weeks. At follow-up at 8 weeks, the patient was running and had not experienced any further episodes of sharp pain during change of direction or sprinting.

    Conclusions: The plantaris tendon should be considered as a possible source of Achilles tendon pain. This case study demonstrates that the plantaris tendon can be found in unexpected (superficial) positions and needs to be carefully visualized during clinical and imaging examinations.

    Download full text (pdf)
    fulltext
  • 24.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine. ISEH, UCLH, London, UK; Pure Sports Medicine Clinic, London, UK.
    Masci, Lorenzo
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Surgical plantaris tendon removal for patients with plantaris tendon-related pain only and a normal Achilles tendon: a case series2018In: BMJ Open Sport & Exercise Medicine, ISSN 2055-7647, Vol. 4, no 1, article id e000462Article in journal (Refereed)
    Abstract [en]

    Objectives: Surgical removal of the plantaris tendon can cure plantaris-associated Achilles tendinopathy, a condition in which Achilles and plantaris tendinopathy coexist. However, rare cases with plantaris tendinopathy alone are often misdiagnosed due to a normal Achilles tendon.

    Design and setting: Prospective case series study at one centre.

    Participants: Ten consecutive patients (9 men and one woman, mean age 35 years, range 19–67) with plantaris tendon-related pain alone in altogether 13 tendons were included. All had had a long duration (median 10 months, range 3 months to 10 years) of pain symptoms on the medial side of the Achilles tendon mid-portion. Preoperative ultrasound showed thickened plantaris tendon but a normal Achilles tendon.

    Interventions: Operative treatment consisting of ultrasound-guided excision of the plantaris tendon.

    Primary and secondary outcome measures: Scores from Victorian Institute of Sports Assessment-Achilles questionnaire (VISA-A)were taken preoperatively and postoperatively (median duration 10 months). Patient satisfaction and time until full return to sports activity level was asked by a questionnaire.

    Results: The VISA-A scores increased from 61 (range 45–81) preoperatively to 97 (range 94–100) postoperatively (p<0.01). Follow-up results at 10 months (range 7–72 months) on 9/10 patients showed full satisfaction and return to their preinjury sports or recreational activity

    Conclusion: The plantaris tendon should be kept in mind when evaluating painful conditions in the Achilles tendon region, especially when no Achilles tendinopathy is present. Excision of the plantaris tendon via a minor surgical procedure in local anaesthesia results in a good outcome.

    Download full text (pdf)
    fulltext
  • 25.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine. Institute of Sports, Exercise and Health, University College Hospital, London, UK.
    Masci, Lorenzo
    Department of Sports and Exercise Medicine, Queen Mary University, London, United Kingdom.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Research Unit, Orthopaedic Spine Center, Dr. Alfen, Würzburg, Germany.
    Ultrasound and surgical inspection of plantaris tendon involvement in chronic painful insertional Achilles tendinopathy: A case series2021In: BMJ Open Sport and Exercise Medicine, ISSN 2055-7647, Vol. 7, no 1, article id e000979Article in journal (Refereed)
    Abstract [en]

    Objectives: Chronic painful insertional Achilles tendinopathy is known to be difficult to manage. The diagnosis is not always easy because multiple different tissues can be involved. The plantaris tendon has recently been described to frequently be involved in chronic painful mid-portion Achilles tendinopathy. This study aimed to evaluate possible plantaris tendon involvement in patients with chronic painful insertional Achilles tendinopathy.

    Methods: Ninety-nine consecutive patients (74 males, 25 females) with a mean age of 40 years (range 24-64) who were surgically treated for insertional Achilles tendinopathy, were included. Clinical examination, ultrasound (US)+Doppler examination, and surgical findings were used to evaluate plantaris tendon involvement.

    Results: In 48/99 patients, there were clinical symptoms of plantaris tendon involvement with pain and tenderness located medially at the Achilles tendon insertion. In all these cases, surgical findings showed a thick and wide plantaris tendon together with a richly vascularised fatty infiltration between the plantaris and Achilles tendon. US examination suspected plantaris involvement in 32/48 patients.

    Conclusion: Plantaris tendon involvement can potentially be part of the pathology in chronic painful insertional Achilles tendinopathy and should be considered for diagnosis and treatment when there is distinct and focal medial pain and tenderness.

    Level of evidence: IV case series.

    Download full text (pdf)
    fulltext
  • 26.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Masci, Lorenzo
    Öhberg, Lars
    Umeå University, Faculty of Medicine, Department of Radiation Sciences, Diagnostic Radiology.
    Partial midportion Achilles tendon ruptures: new sonographic findings helpful for diagnosis.2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 5, p. 429-432Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Partial Achilles tendon ruptures are not always easy to diagnose. A history including a sudden onset of pain, and/or relative weakness in plantar flexion force, are indicators. The most loaded side of the Achilles tendon is the dorsal side (skin side). OBJECTIVE: To evaluate the ultrasound (US) and Doppler (CD) findings in patients with a suspected partial rupture in the Achilles tendon. Material and METHODS: Seventeen patients (16 men and 1 woman) with a mean age of 36 years (range 23-71) were examined clinically and by US+CD because of midportion Achilles tendon pain. There was an acute onset in 14/17 patients, and all had painful weakness during tendon loading activity. RESULTS: In all patients the US examination showed a partial Achilles tendon rupture, presented as a disrupted dorsal (skin side) tendon line and an irregular tendon structure mainly located in the dorsal and mid-tendon. The size of the rupture varied from 1/3 to 2/3 of the tendon thickness. In the dorsal part of the tendon, corresponding to the region with disrupted tendon line and irregular structure, CD examination showed high blood flow-most often of a longitudinal character. Six of the patients were surgically treated, and macroscopical examination verified the ultrasound findings, showing disruption on the dorsal side, and a partial rupture in the dorsal and mid- tendon. CONCLUSIONS: Ultrasound and Doppler examination can be helpful tools to diagnose partial midportion Achilles tendon ruptures. The characteristic findings of a disrupted dorsal tendon line, and high blood flow in the structurally abnormal dorsal tendon, indicate a partial rupture.

  • 27.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine. Alfredson Tendon Clinic, Capio Ortho Center Skåne, Malmö, Sweden.
    Roberts, David
    Capio Ortho Center Skåne, Malmö, Sweden.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Institute for Sports Science, Würzburg University, Würzburg, Germany; Private Orthopaedic Spine Center, Würzburg, Germany.
    Waldén, Markus
    Capio Ortho Center Skåne, Malmö, Sweden; Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
    Ultrasound- and doppler-Guided WALANT arthroscopic surgery for patellar tendinopathy with Partial Rupture in Elite Athletes: a 2-Year follow-up of a prospective case series2024In: Medicina, ISSN 1010-660X, E-ISSN 1648-9144, Vol. 60, no 4, article id 541Article in journal (Refereed)
    Abstract [en]

    Background and Objectives: Patellar tendinopathy is difficult to treat, and when combined with partial rupture, there are additional challenges. The aim of this study was to evaluate the subjective outcome and return-to-sport status after ultrasound (US)- and colour doppler (CD)-guided wide awake local anaesthetic no tourniquet (WALANT) arthroscopic shaving in elite athletes.

    Material and Methods: Thirty Swedish and international elite athletes (27 males) with a long duration (>1 year) of persistent painful patellar tendinopathy in 35 patellar tendons, not responding to non-surgical treatment, were included. All patients were treated with the same protocol of arthroscopic shaving, including bone removal and debridement of partial rupture, followed by at least 3 months of structured rehabilitation. The VISA-P score and a study-specific questionnaire evaluating physical activity level and subjective satisfaction with the treatment were used for evaluation.

    Results: At the 2-year follow-up (mean 23, range 8–38 months), 25/30 patients (29/35 tendons) were satisfied with the treatment result and had returned to their pre-injury sport. The mean VISA-P score increased from 37 (range 7–69) before surgery to 80 (range 44–100) after surgery (p < 0.05). There was one drop-out (one tendon). There were no complications.

    Conclusions: US- and CD-guided WALANT arthroscopic shaving for persistent painful patellar tendinopathy, including bone removal and debridement of partial rupture, followed by structured rehabilitation showed good clinical results in the majority of the elite-level athletes.

    Download full text (pdf)
    fulltext
  • 28.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine. Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Rehabilitation Medicine. ISEH, UCLH, London, UK; Pure Sports Medicine Clinic, London, UK.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). Dr Alfen, Orthopedic Spine Center, 97080 Würzburg, Germany.
    Clinical presentation and surgical management of chronic Achilles tendon disorders: a retrospective observation on a set of consecutive patients being operated by the same orthopedic surgeon2018In: Foot and Ankle Surgery, ISSN 1268-7731, E-ISSN 1460-9584, Vol. 24, no 6, p. 490-494Article in journal (Refereed)
    Abstract [en]

    Background: Non-invasive treatment is not always successful in patients with Achilles tendon disorders, and surgical treatment is instituted as the next step. There is sparse knowledge about the diagnoses, pain levels before surgery, surgically confirmed pathologies and postoperative complications in large patient groups.

    Aims: To study the diagnoses, pain scores before surgery, macroscopic surgical findings and postoperative complications in a series of patients treated for Achilles disorders.

    Material and methods: One surgeon operated on 771 Achilles tendons of 481 men and 290 women during a 10-year period. The clinically and ultrasound confirmed diagnoses, pre-operative pain and functional scores (Visual Analogue Scale, VAS, range 0-100; Victorian Institute Sports Tendon Assessment - Achilles questionnaire, VISA-A), macroscopic findings during surgery and postoperative complications, were retrospectively collected from a database.

    Results: Clinically, by ultrasound and during surgery midportion Achilles tendinopathy was confirmed in 519 (67%) patients, 41% of them had a thickened plantaris tendon located close the Achilles tendon. Partial midportion rupture was found in 31 (4%) patients, chronic midportion rupture in 12 (2%) patients and insertional Achilles tendinopathy, including superficial and retro-calcaneal bursitis, Haglund deformity, distal Achilles tendinopathy, plantaris tendon pathology, and bone spurs, in 209 (27%) patients. The mean pre-operative pain scores for midportion Achilles tendinopathy were 73 (VAS) and 45 (VISA-A), and for insertional Achilles tendinopathy 77 (VAS) and 39 (VISA-A). For midportion Achilles tendinopathy there were 14 (3%), and for insertional Achilles tendinopathy 10 (5%), postoperative complications.

    Conclusions: Patients presenting high pain scores from midportion Achilles tendinopathy were the most common. Plantaris tendon involvement is a frequent observation. For insertional Achilles tendinopathy the combination of pathology in the subcutaneous and retrocalcaneal bursa, a Haglund deformity and distal Achilles tendinopathy/tendinosis was most frequent. 

  • 29.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Forsgren, Sture
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Unilateral surgical treatment for patients with midportion Achilles tendinopathy may result in bilateral recovery2014In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 48, no 19, p. 1421-1424Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Bilateral midportion Achilles tendinopathy/tendinosis is not unusual, and treatment of both sides is often carried out. Experiments in animals suggest of the potential involvement of central neuronal mechanisms in Achilles tendinosis. OBJECTIVES: To evaluate the outcome of surgery for Achilles tendinopathy. METHODS: This observational study included 13 patients (7 men and 6 women, mean age 53 years) with a long duration (6-120 months) of chronic painful bilateral midportion Achilles tendinopathy. The most painful side at the time for investigation was selected to be operated on first. Treatment was ultrasound-guided and Doppler-guided scraping procedure outside the ventral part of the tendon under local anaesthetic. The patients started walking on the first day after surgery. Follow-ups were conducted and the primary outcome was pain by visual analogue scale. In an additional part of the study, specimens from Achilles and plantaris tendons in three patients with bilateral Achilles tendinosis were examined. RESULTS: Short-term follow-ups showed postoperative improvement on the non-operated side as well as the operated side in 11 of 13 patients. Final follow-up after 37 (mean) months showed significant pain relief and patient satisfaction on both sides for these 11 patients. In 2 of 13 patients operation on the other, initially non-operated side, was instituted due to persisting pain. Morphologically, it was found that there were similar morphological effects, and immunohistochemical patterns of enzyme involved in signal substance production, bilaterally. CONCLUSION: Unilateral treatment with a scraping operation can have benefits contralaterally; the clinical implication is that unilateral surgery may be a logical first treatment in cases of bilateral Achilles tendinopathy.

  • 30.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Tol, Johannes
    Sports Medicine Physician Aspetar Qatar Orthopaedic and Sports Medicine Hosptial Doha, Qatar.
    de-Vos, Robert-Jan
    Erasmus Medical Centre and The Hague Medical Centre Rotterdam, The Netherlands.
    Chronic pain in the Achilles tendon2013In: Aspetar Sports Medicine Journal, Vol. 2, no 1, p. 18-22Article in journal (Other academic)
    Download full text (pdf)
    fulltext
  • 31.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine. Capio Ortho Center Skåne, Malmö, Sweden.
    Waldén, Markus
    Capio Ortho Center Skåne, Malmö, Sweden; Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
    Roberts, David
    Capio Ortho Center Skåne, Malmö, Sweden.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Department of Sports Science, University of Würzburg, Sanderring, Germany.
    Combined midportion achilles and plantaris tendinopathy: a 1-year follow-up study after ultrasound and color-doppler-guided walant surgery in a private setting in Southern Sweden2023In: Medicina, ISSN 1010-660X, E-ISSN 1648-9144, Vol. 59, no 3, article id 438Article in journal (Refereed)
    Abstract [en]

    Background and Objectives: Chronic painful midportion Achilles combined with plantaris tendinopathy can be a troublesome condition to treat. The objective was to prospectively follow patients subjected to ultrasound (US)- and color doppler (CD)-guided wide awake, local anesthetic, no-tourniquet (WALANT) surgery in a private setting.

    Material and Methods: Twenty-six Swedish patients (17 men and 9 women, mean age 50 years (range 29-62)) and eight international male patients (mean age of 38 years (range 25-71)) with combined midportion Achilles and plantaris tendinopathy in 45 tendons altogether were included. All patients had had >6 months of pain and had tried non-surgical treatment with eccentric training, without effect. US + CD-guided surgical scraping of the ventral Achilles tendon and plantaris removal under local anesthesia was performed on all patients. A 4-6-week rehabilitation protocol with an immediate full-weight-bearing tendon loading regime was used. The VISA-A score and a study-specific questionnaire evaluating physical activity level and subjective satisfaction with the treatment were used for evaluation.

    Results: At the 1-year follow-up, 32/34 patients (43 tendons) were satisfied with the treatment result and had returned to their pre-injury Achilles tendon loading activity. There were two dropouts (two tendons). For the Swedish patients, the mean VISA-A score increased from 34 (0-64) before surgery to 93 (61-100) after surgery (p < 0.001). There were two complications, one wound rupture and one superficial skin infection.

    Conclusions: For patients suffering from painful midportion Achilles tendinopathy and plantaris tendinopathy, US + CD-guided surgical Achilles tendon scraping and plantaris tendon removal showed a high satisfaction rate and good functional results 1 year after surgery.

    Download full text (pdf)
    fulltext
  • 32.
    Alfredson, Håkan
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine. Alfredson Tendon Clinic, Capio Ortho Center Skåne, Malmö, Sweden.
    Waldén, Markus
    Capio Ortho Center Skåne, Malmö, Sweden; Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
    Roberts, David
    Capio Ortho Center Skåne, Malmö, Sweden.
    Spang, Christoph
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy. Private Orthopaedic Spine Center, Würzburg, Germany; Institute for Sports Science, Würzburg University, Würzburg, Germany.
    Tendinopathic plantaris but normal achilles tendon found in about one-fifth of patients not responding to conservative achilles tendon management: results from a prospective walant surgical case series on 105 tendons2024In: Open Access Journal of Sports Medicine, E-ISSN 1179-1543, Vol. 15, p. 41-45Article in journal (Refereed)
    Abstract [en]

    Purpose: Midportion Achilles tendinopathy is a relatively common condition. This study aimed to investigate the presence of a normal Achilles tendon, but a tendinopathic plantaris tendon, in a large and consecutive prospective sample of patients referred to a specialised tendon clinic for midportion Achilles tendon pain not responding to non-surgical treatment.

    Patients and Methods: A total of 105 consecutive tendons were operated on in 81 patients (62 males) suffering from painful midportion Achilles tendon pain. Clinical examination, ultrasound (US) and colour Doppler (CD) examination, and wide awake local anaesthetic no tourniquet (WALANT) surgery were performed in all patients.

    Results: For 19/105 (18%) tendons from 14 patients, clinical examination suspected plantaris tendinopathy alone as there was a distinct tenderness on the medial side, but no thickening of the Achilles tendon. US examination followed by surgery confirmed the diagnosis.

    Conclusion: Midportion Achilles tendon pain is not always related to Achilles tendinopathy since pain related to the plantaris tendon alone was found in almost every fifth patient. Consequently, there is an obvious need for proper examination to identify the pain source and establish a correct diagnosis before treatment.

    Download full text (pdf)
    fulltext
  • 33.
    Alm, Petter
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Evaluation of Physiological Characters in Mixed Martial Arts Athletes2012Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Abstract

    Introduction: MMA is a relatively new sport and is a mixture of many different martial arts. Currently, studies on the physiological characters of MMA athletes are very limited. The present study is mainly interested in evaluation of MMA athletes with respect to the aerobic and anaerobic capacity.

    Method and materials: 5 male pro MMA athletes were recruited for the study. VO2max and anaerobic threshold measured with different methods were evaluated on treadmill and arm cycle. Muscle strength and power was evaluated through measurement of squat jump, counter movement jump, counter movement jump with arm swing, maximum clean, maximum deadlift and maximum reps of vertical sit-ups. Body composition including bone mineral density, muscle mass and fat mass were also measured.  All the above measurements were performed twice with one year in between. Personal competition records expressed as percentage of win in total competition during the past year or the whole years before each test occasion were also calculated. 

    Result: except for a lower relative VO2max (both on treadmill and arm cycle) and [La] 0min after treadmill test, none of the measurements on absolute VO2max, anaerobic thresholdor body composition showed significant difference in values between the two test occasions. A tendency of decrease in muscle strength/power was observed in the second occasion, where the lower squat jump (cm) and counter movement jump with arm swing (cm/kg) were significant.

    Conclusion: the MMA athletes have reached their physiological capacity needed for the sport or did not prioritized their strength and conditioning training high enough to improve them further.

  • 34.
    Alm, Petter
    et al.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Yu, Ji-Guo
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Physiological characters in mixed martial arts2013In: American Journal of Sports Science, ISSN 2330-8540, Vol. 1, no 2, p. 12-17Article in journal (Refereed)
    Abstract [en]

    Mixed martial arts (MMA) is a relatively new sport and is a mixture of many different martial arts. Currently, study on the physiological characters in the sport is very limited. The present study evaluated the physiological characters in 5 active male MMA athletes at two occasions with one year between. Aerobic- and anaerobic capacity were estimated through measurement of VO2max and anaerobic threshold using both treadmill running and arm cycling. Muscle strength was evaluated through series measurements. Body composition and personal competition records were also examined. The subjects presented above average aerobic capacity, but rather high anaerobic capacity and threshold levels compared with other similar sports. No significant difference in VO2max, anaerobic threshold or body composition was observed between the two test occasions, despite a decreased tendency in muscle strength/power in the second test compared to the first. The results were interpreted to indicate either the MMA athletes had reached the physiological requirements for MMA or the one year physical training was inefficient in further improving the parameters.                                              

  • 35.
    Almgren, Simon
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Danielsson, Andreas
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Påverkan av Muskeltrötthet på Motorisk Kontroll hos Kvinnliga Innebandyspelare2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Non-contact injuries are a big part of overall injuries in floorball. Deficits in motor control due to muscle fatigue may be a factor that causes non-contact injuries. We analyzed movement changes with The Functional Movement ScreenTM (FMS) with and without muscle fatigue on women floorball players. Method: A pilot study with a cross-sectional structure. FMS test was used to measure changes in movements and to reach fatigue a 5-10 min running ramp protocol on treadmill was used. The borg RPE-scale was used to measure perceived exhaustion. Participants: Seven female floorball players playing in teams at the highest two leagues in Sweden. The participants age was 19.7 (±SD 3,2) years, length 166.4 cm (±SD 7,2) and weight 63.1 kg (±SD 4,5). Results: Through observations of the participants we noted a different movement pattern while obtaining muscle fatigue. The results of FMS total score shows no significant difference (p=0,504) before and after the VO2max running test. The FMS results from exercises that includes the lower extremities (deep squat, hurdle step, in-line lunge and straight leg raise) does not either confirm a significant difference (p=0,132). Discussion: Our subjective analyze of the movements confirms a different movement strategy with and without muscle fatigue. The non-parametric statistical analyze does not confirm this change in movements as significant. The Functional Movement Screen might not be a good tool to measure changes in movement because the movement change has to be in a specific criteria to get a lower point. Even though we saw a different movement strategy after the ramp running test, the deficit in movements was not in the specific criteria that was necessary to get a lower point. Conclusion: Through the test results and our observations we conclude that movement pattern change after an exercise that causes fatigue, does not completely show how much the movement patterns changes and what the consequences are. More research has to be done in this area to confirm such results.

  • 36.
    Alvehus, Malin
    et al.
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Medicine.
    Boman, Niklas
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Söderlund, Karin
    Svensson, Michael B.
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Buren, Jonas
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Medicine.
    Metabolic adaptations in skeletal muscle, adipose tissue, and whole-body oxidative capacity in response to resistance training2014In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 114, no 7, p. 1463-1471Article in journal (Refereed)
    Abstract [en]

    The effects of resistance training on mitochondrial biogenesis and oxidative capacity in skeletal muscle are not fully characterized, and even less is known about alterations in adipose tissue. We aimed to investigate adaptations in oxidative metabolism in skeletal muscle and adipose tissue after 8 weeks of heavy resistance training in apparently healthy young men. Expression of genes linked to oxidative metabolism in the skeletal muscle and adipose tissue was assessed before and after the training program. Body composition, peak oxygen uptake (VO2 peak), fat oxidation, activity of mitochondrial enzyme in muscle, and serum adiponectin levels were also determined before and after resistance training. In muscle, the expression of the genes AdipoR1 and COX4 increased after resistance training (9 and 13 %, respectively), whereas the expression levels of the genes PGC-1 alpha, SIRT1, TFAM, CPT1b, and FNDC5 did not change. In adipose tissue, the expression of the genes SIRT1 and CPT1b decreased after training (20 and 23 %, respectively). There was an increase in lean mass (from 59.7 +/- A 6.1 to 61.9 +/- A 6.2 kg), VO2 peak (from 49.7 +/- A 5.5 to 56.3 +/- A 5.0 ml/kg/min), and fat oxidation (from 6.8 +/- A 2.1 to 9.1 +/- A 2.7 mg/kg fat-free mass/min) after training, whereas serum adiponectin levels decreased significantly and enzyme activity of citrate synthase and 3-hydroxyacyl-CoA dehydrogenase did not change. Despite significant increases in VO2 peak, fat oxidation, and lean mass following resistance training, the total effect on gene expression and enzyme activity linked to oxidative metabolism was moderate.

  • 37. Aman, Malin
    et al.
    Forssblad, Magnus
    Henriksson-Larsén, Karin
    Insurance claims data: a possible solution for a national sports injury surveillance system? An evaluation of data information against ASIDD and consensus statements on sports injury surveillance2014In: BMJ Open, E-ISSN 2044-6055, Vol. 4, no 6, article id e005056Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Before preventive actions can be suggested for sports injuries at the national level, a solid surveillance system is required in order to study their epidemiology, risk factors and mechanisms. There are guidelines for sports injury data collection and classifications in the literature for that purpose. In Sweden, 90% of all athletes (57/70 sports federations) are insured with the same insurance company and data from their database could be a foundation for studies on acute sports injuries at the national level.

    OBJECTIVE: To evaluate the usefulness of sports injury insurance claims data in sports injury surveillance at the national level.

    METHOD: A database with 27 947 injuries was exported to an Excel file. Access to the corresponding text files was also obtained. Data were reviewed on available information, missing information and dropouts. Comparison with ASIDD (Australian Sports Injury Data Dictionary) and existing consensus statements in the literature (football (soccer), rugby union, tennis, cricket and thoroughbred horse racing) was performed in a structured manner.

    RESULT: Comparison with ASIDD showed that 93% of the suggested data items were present in the database to at least some extent. Compliance with the consensus statements was generally high (13/18). Almost all claims (83%) contained text information concerning the injury.

    CONCLUSIONS: Relatively high-quality sports injury data can be obtained from a specific insurance company at the national level in Sweden. The database has the potential to be a solid base for research on acute sports injuries in different sports at the national level.

  • 38.
    Anckarman, Erika
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Den framgångsrika personliga tränaren: En kvalitativ studie om klienters upplevelse av vilka egenskaper och faktorer som är viktiga för personliga tränare2016Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: During the last years the fitness industry has expanded fast. Today PT is offered at almost every health club. Training with a PT have positive physical effects but it has also shown an influence on behaviour associated with training. A good relation between client and coach is needed for a positive outcome of the training.

    Purpose: The aim of the study was to investigate what the clients that are training or has trained with at personal trainer during the last year consider as important factors and personal qualities related to personal trainers.

    Design and method: A qualitative descriptive design was used. Data collection was done by semi-structured interviews. Data was analysed with qualitative content analysis.

    Results: The analyses resulted in 3 themes, 6 categories and 17 sub categories. The themes and categories were: To appear as competent: Appearance and displayed experience ,Give a feeling of a broad knowledge.

    Coaching style: To be present here and now, To personalize Pedagogical strategies: Tools to reach results, To create a secure feeling,

    Conclusion: Background information of the PT should always be available at the health club or on the website. The client should have the opportunity to choose a PT based on their personal requests. This may result in good preconditions for a strong and effective working alliance. Reserach in this area are limited therefor further studies are needed. 

    Download full text (pdf)
    fulltext
  • 39.
    Anderback, Nanny-Maja
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Öling, Kajsa
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Kan fysisk aktivitet under graviditeten reducera graviditetsrelaterade besvär?2017Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    Background: Many women are pregnant for one or more periods of their lives. During this time, studies have shown that women tend to become physically inactive. With a pregnancy, there is also an increased risk of other diseases and disorders such as pregnancy diabetes and obesity. Studies have shown that physical activity can prevent some of these disorders. Traditionally, the general opinion on physical activity during pregnancy has been that it could be dangerous for both the pregnant woman and the fetus. Today, there is a more liberal view of physical activity during pregnancy, but research is still inadequate.Aim: Our purpose with this literature study is to examine the effects of physical activity during pregnancy in pregnancy-related disorders, and look into the current recommendations on physical activity during pregnancy.Results: Our study has seen positive effects of physical activity during pregnancy especially in pregnancy-related disorders such as lumbar pain, pelvic floor dysfunction, fatigue, gestational diabetes and weight gain, as well as some positive trends in preeclampsia, edema and pelvic girdle pain. The research on nausea and rectus diastasis is too inadequate to draw any conclusions about possible effects.Conclusion: More RCT studies on pregnancy-related disorders are needed to reach consensus about what type of physical activity, duration, intensity and frequency during pregnancy that are beneficial for these disorders. From this knowledge we can then work out more specific recommendations.

  • 40.
    Andersson, Annie
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Björkén, Rebecca
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Kan fysisk aktivitet och kost ha en positiv inverkan på fysiska och psykiska subkliniska menstruella besvär?2018Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    Background: Many women experience physical and psychological symptoms during their menstrual cycle. Research is scarce about how to ease subclinical menstrual disorders like dysmenorrhea, menorrhagia, premenstrual syndrome, premenstrual dysphoric syndrome, oligomenorrhea and amenorrhea without using medicines. Physical activity and diet is proved to have positive effects on several diseases and we therefore wanted to see if positive effects also could be seen on subclinical menstrual disorders.

    Aim: The aim of this study was to investigate if physical activity and diet could reduce physical and psychological subclinical menstrual disorders and lead to a better wellbeing.

    Method: Searching for subclinical menstrual disorders in relation to physical activity and diet in fertile, active and inactive women without the use of hormonal contraceptives was done using Pubmed.

    Results: The study has shown that physical activity and diet could reduce some of the problems associated with subclinical menstrual disorders. Premenstrual syndrome (PMS) could be eased through calm, meditative activities. Positive effects could be seen when eating more often but smaller meals containing complex carbohydrates and by taking additional vitamins and minerals. Yoga has been proved to reduce menstrual pain and there’s also an indication that physical activity could improve the regularity of the menstrual cycle. Adequate energy intake is needed to avoid oligomenorrhea and amenorrhea. No clear recommendations were found for the remaining subclinical menstrual disorders.

    Conclusion: The study has shown that physical activity and diet have positive effects on some subclinical menstrual disorders. Symptoms of PMS could be eased by calm, meditative activities. Yoga and physical activity have been shown to reduce dysmenorrhea. Adequate energy intake is essential to avoid oligomenorrhea and amenorrhea. Further research is needed to give general recommendations.

    Download full text (pdf)
    fulltext
  • 41.
    Andersson, Anton
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Radiell eller fokuserad stötvågsbehandling vid akillestendinopati: En systematisk litteraturöversikt2021Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of this review was to compare radial versus focused shock wave therapy and to review shock wave therapies usage to reduce pain and increase physical function for the Achilles tendinopathy.The review has followed PRISMA’s checklist while using PubMed, SPORTDiscus, CINAHL, Scopus and Web of Science databases. Data has been analyzed narratively and the evidence of the outcomes has been assessed.A significant difference in pain reduction was seen within two studies for both interventions. Where radial shock wave therapy was administered the intervention groups had a higher pain reduction than the control group. Where focused shock wave therapy was administered the control group had a higher pain reduction than the intervention group. A significant difference in the restoration of physical function was seen within three studies for radial shock wave therapy and two studies for focused shock wave therapy. Where radial shock wave therapy was administered the intervention groups had a greater increased physical function than the control groups and where focused shock wave treatment was administered the control groups had a greater increased physical function than the intervention groups.Radial shock wave therapy seems to be effective to reduce pain and increase physical function in the Achilles tendinopathy. The evidence of the results for focused shock wave therapy is too low to draw any conclusion, or allow us to compare the two methods. Had the studies allowed for a direct comparison between the two methods, this could have led to a guide for healthcare professionals. 

    Download full text (pdf)
    fulltext
  • 42.
    Andersson, Fredrik
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    The feasibility of using a training- and injury log to quantify training load and injury incidence in powerlifting2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Little is known about injuries and risk factors in powerlifting. In other sports, training load is an important factor that influences injury risk. However, no method to quantify training load in powerlifting exist.Objectives:

    The purpose of this study was to assess whether a standardised training and injury log is a feasible method to quantify training load and to prospectively record injuries.Method:The study was conducted in two phases with 7 respectively 8 powerlifters in each phase. In phase 1, the powerlifters logged their injuries and training for four weeks and then answered a feasibility questionnaire. Based on the results from the questionnaire, updates in the training and injury log were made and the powerlifters in phase 2 logged their training and injuries using the updated version and answered the same questionnaire as the powerlifters in phase 1.

    Results:

    It was possible to extract data and make calculations on training load based on the variables used in the training log and it was possible to calculate injury incidence and prevalence. Also, 9/12 powerlifters stated that they could use this standardised method for a period of at least 6 months.

    Conclusion:

    In conclusion, this standardised training and injury log seems to be a method to quantify training load and injuries in powerlifting. Further studies are needed to investigate the relationship between training load and injuries in powerlifting.

  • 43.
    Andersson, Gustav
    et al.
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Backman, Ludvig
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Scott, Alexander
    Department of Physical Therapy, University of British Columbia, Vancouver, British Columbia, Canada; Centre for Hip Health and Mobility, Vancouver Coastal Health and Research Institute, Vancouver, British Columbia, Canada.
    Lorentzon, Ronny
    Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Sports Medicine.
    Forsgren, Sture
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Danielson, Patrik
    Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Anatomy.
    Substance P accelerates hypercellularity and angiogenesis in tendon tissue and enhances paratendinitis in response to Achilles tendon overuse in a tendinopathy model2011In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 45, no 13, p. 1017-1022Article in journal (Refereed)
    Abstract [en]

    Background Tenocytes produce substance P (SP) and its receptor (neurokinin-1 receptor (NK-1R) is expressed throughout the tendon tissue, expecially in patients with tendinopathy and tissue changes (tendinosis) including hypercellularity and vascular proliferation. Considering the known effects of SP, one might ask whether SP contributes to these canges.

    Objectives To test whether development of tendinosislike changes (hypercellularity and angiogenesis) is accelerated during a 1-week course of ecercise with local administration of SP in an establish Achilles tendinopathy model.

    Methods Rabbits were subjected to a protocol of Achilles tendon overuse for 1 week, in conjunction with SP injections in the paratenon. Exercised control animals received NaCl injections or no injections, and unexercised, uninjected controls were also used. Tenocyte number and vascular density, as well as paratendinous inflammation, were evaluated. Immunohistochemistry and in sity hybridisation to detect NK-1R were conducted.

    Results There was a significant increase in tenocyte number in the SP-injected and NaCl-injected groups compared with both unexercised and exercised, uninjected controls. Tendon blood vessels increased in number in the SP-injected group compared with unexercised controls, a finding not seen in NaCl-injected controls or in uninjected, exercised animals. Paratendinous inflammation was more pronounced in the SP-injected group than in the NaCl controls. NK-1R was detected in blood vessel walls, nerves, inflammatory cells and tenocytes.

    Conclusions SP accelerated the development of tendinosis-like changes in the rabbit. Achilles tendon, which supports theories of a potential role of SP in tendinosis development; a fact of clinical interest since SP effects can be effectively blocked. The angiogenic response to SP injections seems related to parateninitis.

  • 44.
    Andersson, Hannes
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Gröntvedt, John
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Effekten av 8-veckors medicinbollsträning på smashhastighet hos badmintonspelare2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 45.
    Andersson, Helena
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation.
    Caspers, Andreas
    Center for Health and Performance, University of Gothenburg, Gothenburg, Sweden; Department of Food and Nutrition, and Sport Science, University of Gothenburg, Gothenburg, Sweden.
    Godhe, Manne
    Department of Physical Activity and Health, The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Helge, Torbjörn
    Department of Physical Activity and Health, The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Eriksen, Julia
    Department of Medicine, Geriatrics and Acute Medicine, Östra Sjukhuset, Sahlgrenska University Hospital, Gothenburg, Sweden.
    Fransson, Dan
    Center for Health and Performance, University of Gothenburg, Gothenburg, Sweden; Department of Food and Nutrition, and Sport Science, University of Gothenburg, Gothenburg, Sweden.
    Börjesson, Mats
    Center for Health and Performance, University of Gothenburg, Gothenburg, Sweden; Department of Medicine, Geriatrics and Acute Medicine, Östra Sjukhuset, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Molecular and Clinical Medicine, University of Gothenburg Sahlgrenska Academy, Göteborg, Sweden.
    Ekblom-Bak, Elin
    Department of Physical Activity and Health, The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Walking football for Health–physiological response to playing and characteristics of the players2023In: Science and medicine in football, ISSN 2473-3938, E-ISSN 2473-4446Article in journal (Refereed)
    Abstract [en]

    Walking Football (WF) is one type of recreational football increasing in popularity, targeting older adults. Further knowledge on the intensity and physical workload of WF, characteristics of the players, the social context, and reasons for playing WF is needed. Thus, the aim of the study was to characterize the individuals that regularly play WF and their experience of WF, and the physiological characteristics of the sport. Sixty-three players from three clubs taking part in organised WF in Sweden were included. The players participated in up to four WF-games and underwent performance tests and answered a questionnaire. The participants mean age was 70.9 years, ranging from 63 to 85 years with 71% (n = 27) of the men and 68% (n = 13) of the women having a BMI > 25. Fifty-one percent (n = 27) of the players had hypertension, and 73% (n = 39) regularly used prescription drugs due to illness. During WF, the players covered on average 2,409 m (2,509 m for men and 2,205 m for women, p =.001). Expressed in percentage of their age-estimated maximal heart rate, mean heart rate represented 80 ± 9 and 80 ± 8% of max for men, and 78 ± 9 and 79 ± 9% of max for women in the first and second halves, respectively, hence WF can be considered a moderate intensity activity for older adults. The main reason for WF participation was to socialize. WF includes a considerable number of accelerations and decelerations, making it more energetically and mechanically demanding than walking.

    Download full text (pdf)
    fulltext
  • 46.
    Andersson, Henrik
    et al.
    Umeå University, Faculty of Social Sciences, Department of Psychology.
    Nilsson, Mikael
    INTERNET-BASED MINDFULNESS-ACCEPTANCE-COMMITMENT IN SPORTS: A RANDOMISED CONTROLLED TRIAL2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The psychological aspects of sports is crucial for performance and important for sustaining good mental health. Despite this, efforts to improve those aspects are surprisingly rare and partly due to stigmatization of help-seeking together with lack of time and economic resources. However, in recent decades much research on internet-based interventions have been conducted. Also, a growing body of empirical support for the Mindfulness-Acceptance-Commitment approach (MAC) related to enhancement in performance and mental health in sports has emerged. This study was the first to explore the effects of internet-based MAC, which was conducted with the digital self-care programme ACTSPORT with or without feedback. Of 193 participants (aged 18 - 71, from 40 different sports on a variety of levels) who were randomly assigned to feedback, non-feedback and waitlist group, 125 completed the study. The results showed that participants who completed ACTSPORT with feedback experienced significantly enhanced performance, reduced performance anxiety and improved mental health, which included higher quality of life and less symptoms of depression. These improvements were predicted by significant improvements in acceptance and dispositional mindfulness. A larger effect was found for participants with feedback which indicated that some support is preferable. In conclusion, the present study indicate that internet-based interventions in sport may be  effective, time-saving, cost-effective, flexible and available means for both enhancement in performance and aspects of mental health.

    Download full text (pdf)
    INTERNET-BASED MINDFULNESS-ACCEPTANCE-COMMITMENT IN SPORTS: A RANDOMISED CONTROLLED TRIAL
  • 47.
    Andersson, Isak
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Occlusion Training as Rehabilitation after ACL-injury: A Review and Meta-analysis2022Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A common issue after injuries with or without surgery is muscular atrophy. Every year approximately 8000 individuals injure their ACL only in Sweden and 4000 undergo surgery. Rehabilitation usually consists of strength training and 70 % of 1RM is a preferred weightwhen trying to build strength and muscle. This systematic review and meta-analysis were investigating the effect of occlusion training after ACL injury compared to traditional rehabilitation, measured with knee function, muscle strength, pain and muscle mass. In this review PubMed, Cinahl, Sportsmedicine & Education index, Cochrane Library, SportDiscus and Web of Science were used for the database search. Two independent authors performed the selection process, GRADE and risk of bias assessment. A total of nine studies were included for the synthesis where four could be included in the meta-analysis. No significant difference were found in the meta-analysis looking at muscle mass. No meta-analysis could be performed on knee function, muscle strength or knee pain. There was a significant difference in the intervention group performing occlusion training compared to the control group when looking at knee pain and knee function, but could not be verified bymeta-analysis. In conclusion occlusion training compared with traditional rehabilitation occlusion training seem to reduce experienced pain during training, increase knee function, preserve more muscle mass and give similar results in strength after 16 days to 16 weeks post ACLR.

    Download full text (pdf)
    fulltext
  • 48.
    Andersson, Linda
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Andersson, Ida
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Samband mellan överkroppsstyrka och prestation i skidspåret hos svenska längdskidåkande juniorer.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Previous research has identified strength as a key factor for performance in cross-country skiing. The purpose of the present study was to investigate the relationship between upper body strength and performance in swedish junior cross-country skiers. 33 swedish young men and 23 young women age 17,3 ± 1,0 years volunteered to participate in specific tests during a summer training camp were they completed a test battery consisting of bench press and bench pull. The strength variables obtained were correlated with FIS-points (International Ski Federation´s ranking points for distance and sprint performance) used as the performance indicator. Correlations were performed by Spearman´s rank correlation coefficient for all variables. The results showed that FIS-points for sprint correlated significantly with both bench press and bench pull. No significant correlation was found between FIS-points for distance and bench pull. These results may predict performance for cross-country skiers and indicate a justification for increased proportion of strength training. 

    Download full text (pdf)
    Samband mellan överkroppsstyrka och prestation
  • 49.
    Andersson, Linnea
    et al.
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    Rydberg, Caroline
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Sports Medicine.
    TRÄNING OCH UPPLEVELSE AV TRÄNINGSINFORMATION TILL MOTIONSVANA GRAVIDA KVINNOR SOM TRÄNAR PÅ HÖGINTENSIV NIVÅ2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Women exercises more now than before, and many of them become pregnant. Exercise during pregnancy has many health benefits. Most advice about exercise during pregnancy is about exercise at a moderate intensity and prevention of pregnancy complications. Some women exercise more than these recommendations. There are advice and recommendations for elite athletes and research on high intensity exercise during pregnancy. Although it is unclear if these advice reaches pregnant women who exercises at a high intensity level.

    Objective: To examine if the amount of exercise changed during pregnancy for healthy women who exercised at a high intensity level, how they had perceived the information about exercise during pregnancy they had received and where they got the information from.

    Participants: Eighteen women (23–37 years) participated in the study. Criteria for inclusion were first time pregnancy, pregnant in the third trimester up until four weeks postpartum, pregnancy without complications and exercise at a high intensity at least three times a week during at least one year before and up until the pregnancy, either cardio, strength or both.

    Method: The participants answered an online survey with 23 questions. The questions were about amount of exercise during pregnancy and the information about exercise the women had received during pregnancy.

    Results: Most of the women decreased their amount of exercise during pregnancy and many of the women lacked adequate information to be able to exercise at desired level. Information about exercise came mainly from midwifes.

    Conclusion: The amount of exercise in healthy exercising pregnant women have decreased during pregnancy at the same time as the women lacked adequate information about exercise. The women received information about exercise mainly from midwifes. It cannot be said if the lack of information has affected the amount of exercise but that would be interesting to investigate further in future studies. Continued research about high intensity exercise during pregnancy is needed to be able to give adequate information to pregnant women who exercises at a high intensity.

    Download full text (pdf)
    fulltext
  • 50.
    Andersson, Terese
    Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
    Menstruationscykelns och p-pillers påverkan på den fysiska prestationsförmågan2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Effects of Menstrual Cycle and Oral Contraceptives on Sport Performance

    During the menstrual cycle, there is a variation of the female steriod hormones estrogen and progestogen. These hormones has mainly reproduktive functions, but do also affect other physiological systems, which may have an influence on athletic performance. The use of oral contraceptives among female athletes matches the use among the general population. There is a concern among female athletes and there coaches weather oral contraceptives can affect the performance. The purpose of this litterature review is to determine the effect of the menstrual cycle and the use of oral contraceptives on athletic performance. Most studies indicates that neither the aerobic performance or VO₂max changes during the mestrual cycle, but an increase in ventilation during the lutheal phase has been observed. In the lutheal phase, the body temperature is elevated, which can affect the performance negatively during physical activity in hot and humid conditions. Studies evaluating the anaerobic performance shows varied results, which can be explained by few study participants, different study designs and varying definitions of menstrual cycle phase. Some studies that have examined the strength variation have not seen any difference, and others have seen an advantage during the follicular phase, when it also seems to be beneficial to train more strength training to optimize training adaptation. The use of oral contraceptives can affect the body composition of female athletes. Fat mass and BMD can increase, and is seen mainly in athleteswith mestrual dysfunctions. This can be benificial for their health and decrease the risk of injury, but may decrease performace level. The effect of oral contraceptive administration on aerobic capacity, anaerobic capacity and strength are unclear and the research has come up with varying results. Future studies should investigate oneoral contraceptive pill formulation at a time, andalso compare different formulations, to determineif that affect performance in different ways.

    Key words: menstruation, oral contraceptives, female athlete, performance, hormones

    Download full text (pdf)
    Menstruationscykelns och p-pillers påverkan på den fysiska prestationsförmågan
1234567 1 - 50 of 695
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf