umu.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Tegern, Matthias
Publications (5 of 5) Show all publications
Bohman, T., Tegern, M., Halvarsson, A., Broman, L. & Larsson, H. (2018). Concurrent validity of an isokinetic lift test used for admission to the Swedish Armed Forces. PLoS ONE, 13(11), Article ID e0207054.
Open this publication in new window or tab >>Concurrent validity of an isokinetic lift test used for admission to the Swedish Armed Forces
Show others...
2018 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 11, article id e0207054Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to assess the concurrent validity of the IsoKai isokinetic lift test peak force (IsoKai(Peak))1 in comparison to a submaximal 5-1ORM deadlift test (5-10RM(DL)), and to develop an equation for converting the IsoKai(Peak) in Newton (N) to an estimated 1 RM (1 RMest) deadlift load in kilograms (kg). The participants included 28 males and 16 female employees in the Swedish Armed Forces (20-59 years). Each participant conducted the IsoKai lift test, followed by the 5-1ORM(DL) test at one occasion. The Pearson's correlation coefficient, with a 95% confidence interval was calculated to evaluate the validity between the IsoKai(peak) and the 1 RMest deadlift load derived from the 5-10RM(DL) test. Univariate and multivariable linear regressions were used to derive the equation for calculating the 1 RMest deadlift load based on the IsoKai(Peak)- The IsoKai(p)(eak) showed good- to-excellent correlation with the 1 RMest deadlift weight with a correlation coefficient of 0.84 (0.72-0.91) for the total sample, and 0.65 (0.37-0.83) and 0.81 (0.53-0.93) in males and females, respectively. The final equation, 1 RMest deadlift weight (kg) = -51.63 + (0.08 x IsoKai(Peak))1+ (2.28 x BMI), explained 72% (adjusted R-2 = 0.72) of the total variance in the 1 RMest, and had a standard error of the estimate (SEE) of 16.57 kg. In conclusion, the IsoKai isokinetic lift test could be considered a highly valid measure of maximal dynamic muscular strength in comparison to the 5-10RM(DL). The equation can be used to convert the IsoKai lift test (N) results to an 1 RMest deadlift load (kg), but with consideration of the relative large SEE.

Place, publisher, year, edition, pages
Public Library of Science, 2018
National Category
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-153644 (URN)10.1371/journal.pone.0207054 (DOI)000449374000043 ()30399188 (PubMedID)
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
Tegern, M., Aasa, U., Ang, B. O., Harms-Ringdahl, K. & Larsson, H. (2018). Inter-rater and test-retest reliability of movement control tests for the neck, shoulder, thoracic, lumbar, and hip regions in military personnel. PLoS ONE, 13(9), Article ID e0204552.
Open this publication in new window or tab >>Inter-rater and test-retest reliability of movement control tests for the neck, shoulder, thoracic, lumbar, and hip regions in military personnel
Show others...
2018 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 9, article id e0204552Article in journal (Refereed) Published
Abstract [en]

Strategies are needed to mitigate the high rates and related risks of musculoskeletal complaints and injuries (MSCI) in the military aviator community. Previous work on Swedish Armed Forces (SwAF) soldiers have shown that proper screening methods have been successful in reducing early discharge from military training. Research has pointed at the importance of optimal spinal movement control in military aviators. The aim of this work was to investigate the inter-rater and test-retest reliability of a battery of clinical tests for evaluating movement control in the neck, shoulders, thoracic, lumbar, and hip regions in a population of SwAF military personnel. Inter-rater and test-retest reliability of 15 movement control tests were assessed by crude and prevalence-adjusted kappa coefficient. The study included 37 (inter-rater) and 45 (test-retest) SwAF personnel and was performed with two physiotherapists simultaneously observing and rating the movements on the first occasion and repeated with one physiotherapist on the second occasion. For inter-rater reliability, the kappa coefficient ranged from .19 to .95. Seven tests showed substantial to almost perfect agreement (kappa > .60). With the adjusted kappa, three more tests reached the level of substantial agreement. The corresponding values for test-retest reliability ranged from .26 to .65. Substantial agreement was attained for two tests, three with adjusted kappa. The following tests can reliably be used when screening for biomechanically less advantageous movement patters in military aviators: Shoulder flexion, and rotation, Neck flexion in sitting and supine, Neck extension and rotation in sitting, Pelvic tilt, Forward lean and Single and Double knee extension tests. Grading criteria for tests in supine and quadruped positions need to be further elaborated.

Place, publisher, year, edition, pages
Public Library Science, 2018
National Category
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-153721 (URN)10.1371/journal.pone.0204552 (DOI)000445639700062 ()30252903 (PubMedID)
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
Bohman, T., Tegern, M., Halvarsson, A., Broman, L. & Larsson, H. (2018). Reliability and agreement of the IsoKai isokinetic lift test - A test used for admission to the Swedish Armed Forces. PLoS ONE, 13(12), Article ID e0209419.
Open this publication in new window or tab >>Reliability and agreement of the IsoKai isokinetic lift test - A test used for admission to the Swedish Armed Forces
Show others...
2018 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 12, article id e0209419Article in journal (Refereed) Published
Abstract [en]

This study was performed to evaluate the reliability and agreement of the IsoKai isokinetic lift test as it is currently administered in admission to the Swedish Armed Forces. The study included an intrarater (n = 534) and interrater reliability sample (n = 137), of Swedish male conscripts who performed the test on two test occasions about two hours apart. Two-to-four lifts were performed at each occasion, and the highest mean (IsoKai(MF)) and peak force (IsoKai(PF)) produced (N) were used for evaluation. All intraclass coefficients showed excellent reliability. The interrater analyses resulted in intraclass coefficients of 0.942 (95% CI; 0.920-0.959) and 0.858 (95% CI; 0.806-0.896) for the IsoKai(MF) and IsoKai(PF), respectively, while the corresponding coefficients for the intrarater analyses were 0.935 (95% CI; 0.923-0.946) and 0.865 (95% CI; 0.842-0.886). Agreement, the capability of a test to detect changes, was assessed by the standard error of measurement (SEM/SEM%) and the smallest real difference (SRD/SRD%). These estimate indicated that it is possible to achieve measurements relevant to use in real practice with the IsoKai isokinetic lift test. Bland and Altman analyses revealed no systematic errors in either sample. Based on these findings, the IsoKai isokinetic lift test is suggested to be a highly reliable test for maximal dynamic muscular strength. The test could be of use in selection procedures in order to accurately evaluate maximal dynamic muscular strength, and for evaluating longitudinal changes in strength.

Place, publisher, year, edition, pages
Public Library Science, 2018
National Category
Other Medical Sciences not elsewhere specified
Identifiers
urn:nbn:se:umu:diva-155098 (URN)10.1371/journal.pone.0209419 (DOI)000453779300090 ()30566536 (PubMedID)
Available from: 2019-01-10 Created: 2019-01-10 Last updated: 2019-01-10Bibliographically approved
Halvarsson, A., Hagman, I., Tegern, M., Broman, L. & Larsson, H. (2018). Self-reported musculoskeletal complaints and injuries and exposure of physical workload in Swedish soldiers serving in Afghanistan. PLoS ONE, 13(4), Article ID e0195548.
Open this publication in new window or tab >>Self-reported musculoskeletal complaints and injuries and exposure of physical workload in Swedish soldiers serving in Afghanistan
Show others...
2018 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 4, article id e0195548Article in journal (Refereed) Published
Abstract [en]

Background: Musculoskeletal complaints and injuries (MSCI) are common in military populations. However, only a limited number of studies have followed soldiers during international deployments and investigated the prevalence of MSCI during and at the end of their deployment. The aim was to describe the prevalence of MSCI in different military occupational specialties and categorise their most common tasks in terms of exposures to physical workloads during a six-month long international deployment in Afghanistan. Methods: Cross-sectional survey, including 325 soldiers (300 men), aged 20-62 participating in an international deployment in Afghanistan during the spring of 2012. Soldiers were clustered into different military occupational specialties: Infantry, Administration, Logistics, Logistics/Camp, Medical and Other. Data were collected through the use of the Musculoskeletal Screening Protocol at the end of the international mission. Results: Forty-seven percent reported MSCI during deployment, with 28% at the end. The most common locations of MSCI during the mission were lower back, knee, shoulders, upper back, neck and foot, while the knee and lower back prevailed at the end of the mission. Almost half of the soldiers who had MSCI reported affected work ability. The most common duties during the mission were vehicle patrolling, staff duties, guard/security duties, foot patrols and transportation. Soldiers reported that vehicle patrolling, staff duties and transportation were demanding with respect to endurance strength, guard/security duties challenged both maximum and endurance strength while foot patrolling challenged maximum and endurance strength, aerobic and anaerobic endurance and speed. Conclusions: MSCI during international deployment are common among Swedish soldiers. The results indicate the need to further develop strategies focusing on matching the soldiers' capacity to the job requirements, with relevant and fair physical selection-tests during the recruitment process and proactive interventions targeting MSCI before and during deployment, in order to enhance soldiers' readiness and promote operational readiness.

Place, publisher, year, edition, pages
Public library science, 2018
National Category
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-147305 (URN)10.1371/journal.pone.0195548 (DOI)000429206800100 ()29621324 (PubMedID)
Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-06-09Bibliographically approved
Larsson, H., Tegern, M., Monnier, A., Skoglund, J., Helander, C., Persson, E., . . . Aasa, U. (2015). Content Validity Index and Intra- and Inter-Rater Reliability of a New Muscle Strength/Endurance Test Battery for Swedish Soldiers. PLoS ONE, 10(7), Article ID e0132185.
Open this publication in new window or tab >>Content Validity Index and Intra- and Inter-Rater Reliability of a New Muscle Strength/Endurance Test Battery for Swedish Soldiers
Show others...
2015 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, no 7, article id e0132185Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to examine the content validity of commonly used muscle performance tests in military personnel and to investigate the reliability of a proposed test battery. For the content validity investigation, thirty selected tests were those described in the literature and/or commonly used in the Nordic and North Atlantic Treaty Organization (NATO) countries. Nine selected experts rated, on a four-point Likert scale, the relevance of these tests in relation to five different work tasks: lifting, carrying equipment on the body or in the hands, climbing, and digging. Thereafter, a content validity index (CVI) was calculated for each work task. The result showed excellent CVI (>= 0.78) for sixteen tests, which comprised of one or more of the military work tasks. Three of the tests; the functional lower-limb loading test (the Ranger test), dead-lift with kettlebells, and back extension, showed excellent content validity for four of the work tasks. For the development of a new muscle strength/endurance test battery, these three tests were further supplemented with two other tests, namely, the chins and side-bridge test. The inter-rater reliability was high (intraclass correlation coefficient, ICC2,1 0.99) for all five tests. The intra-rater reliability was good to high (ICC3,1 0.82-0.96) with an acceptable standard error of mean (SEM), except for the side-bridge test (SEM%>15). Thus, the final suggested test battery for a valid and reliable evaluation of soldiers' muscle performance comprised the following four tests; the Ranger test, dead-lift with kettlebells, chins, and back extension test. The criterion-related validity of the test battery should be further evaluated for soldiers exposed to varying physical workload.

Place, publisher, year, edition, pages
Public library science, 2015
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:umu:diva-107299 (URN)10.1371/journal.pone.0132185 (DOI)000358197600087 ()26177030 (PubMedID)
Available from: 2015-08-24 Created: 2015-08-21 Last updated: 2018-06-07Bibliographically approved
Organisations

Search in DiVA

Show all publications