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Dynamic and static quadriceps muscle endurance in people with COPD and healthy age and gender-matched controls
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0002-3212-4708
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0003-2782-7959
2019 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 54, no suppl 63Article in journal, Meeting abstract (Refereed) Published
Abstract [en]

Introduction: It is commonly known that quadriceps muscle endurance is decreased among people with COPD, however, whether static and dynamic quadriceps muscle endurance is affected to the same extent, remains to be determined. The latter of importance for the design of exercise modalities targeting quadriceps endurance in COPD.Methods: Static (isometric) and dynamic (isokinetic, isotonic) measurements of quadriceps muscle endurance was performed using a computerized dynamometer on 30 of individuals with COPD (FEV1 63% predicted) and 30 healthy age and gender-matched controls. Test order was randomized, separated by 30 min of rest. Comparisons between groups included both relative (seconds/repetitions) and absolute (total work [Nm]) measures of quadriceps endurance. Between-group results are presented as percentage difference (%) and effect sizes (ES).Results: When compared to healthy age and gender matched controls, people with COPD had significantly lower absolute measures of quadriceps endurance (isometric -32%, ES 0.66 [moderate]; isokinetic -29%, ES 0.94 [large], isotonic -38%, ES 0.89 [large], all p <0.05) as well as lower relative measures of dynamic quadriceps endurance (isotonic [repetitions] -20%, ES 0.50 [moderate], p = 0.02) while static quadriceps endurance did not differ between groups (isometric [seconds] -3%, ES 0.06 [trivial], p = 0.617).Conclusion: As evident by larger ES, dynamic quadriceps endurance seems to be reduced to a larger extent than static quadriceps endurance in people with COPD. Thus, exercise modalities that aim to improve quadriceps endurance should preferably be designed to increase dynamic quadriceps muscle enduranceFootnotesCite this article as: European Respiratory Journal 2019; 54: Suppl. 63, OA3814.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).

Place, publisher, year, edition, pages
European Respiratory Society , 2019. Vol. 54, no suppl 63
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-166661DOI: 10.1183/13993003.congress-2019.OA3814OAI: oai:DiVA.org:umu-166661DiVA, id: diva2:1380963
Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2024-03-22Bibliographically approved

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Publisher's full texthttps://erj.ersjournals.com/content/54/suppl_63/OA3814

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Frykholm, ErikNyberg, Andre

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