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Title: Is quadriceps endurance reduced in COPD?: A systematic review
Authors: Evans, Rachael A.
Kaplovitch, Eric
Beauchamp, Marla K.
Dolmage, Thomas E.
Goldstein, Roger S.
Gillies, Clare L.
Brooks, Dina
Mathur, Sunita
First Published: 23-Oct-2014
Publisher: American College of Chest Physicians (ACCP)
Citation: Chest, 2015, 147 (3), pp. 673-684
Abstract: BACKGROUND: Although the aerobic profile of the quadriceps muscle is reduced in COPD, there is conflicting evidence regarding whether this leads to reduced quadriceps muscle endurance. We, therefore, performed a systematic review of studies comparing quadriceps endurance in individuals with COPD with that in healthy control subjects. METHODS: Relevant studies were identified by searching six electronic databases (1946-2011). Full-text articles were obtained after two researchers independently reviewed the abstracts. The results were combined in a random effects meta-analysis, and metaregression models were fitted to assess the influence of the type of measurement. RESULTS: Data were extracted from 21 studies involving 728 individuals with COPD and 440 healthy control subjects. Quadriceps endurance was reduced in those with COPD compared with healthy control subjects (standardized mean difference, 1.16 [95% CI, 1.02-1.30]; P < .001) with a 44.5 s (4.5-84.5 s; P = .029) reduction in COPD (large effect size) when measured using a nonvolitional technique. The relationship between quadriceps endurance in those with COPD and control subjects did not differ when comparing nonvolitional and volitional techniques (P = .22) or when high- or low-intensity tasks (P = .44) were undertaken. CONCLUSIONS: Quadriceps endurance is reduced in individuals with COPD compared with healthy control subjects, independent of the type of task performed.
DOI Link: 10.1378/chest.14-1079
ISSN: 0012-3692
eISSN: 1931-3543
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2015, American College of Chest Physicians (ACCP). Deposited with reference to the publisher’s open access archiving policy. The post-print version archived is distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License ( ), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Appears in Collections:Published Articles, Dept. of Infection, Immunity and Inflammation

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