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- W2079283188 abstract "1692 COPD patients show abnormalities in metabolism and ultrastructure of skeletal muscle oxidative capacities. The origin of these changes is not well known. The purpose of this study is to study motor unit recruitment strategies using electromyogram (EMG) power spectra frequencies in 25 COPD patients(FEVI=35.8±2.8% pred; mean±SEM) and in 10 age matched normals(N) (66.7±1.5 vs 64.5±1.3 years respectively). First, surface EMG on vastus lateralis was taken during isometric maximal voluntary contraction (MVC) and at 80%, 60%, 40%, 20% of MVC. Secondly, EMG was recorded during a maximal incremental ergocycle test. Median frequencies were analyzed during each isometric contraction and at the first (0 load) and maximal exercise step of ergocycle test. T-test was used to compare groups. Median frequencies in Hz: TableTableANOVA revealed no difference in median frequencies between the different percentages of MVC for each groups. During ergocycle test, median frequency decreased more in N than in COPD. We conclude that COPD use different motor unit recruitment strategies in isometric and in fatigued dynamic contractions." @default.
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- W2079283188 date "1998-05-01" @default.
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- W2079283188 title "MOTOR UNIT RECRUITMENT STRATEGIES IN COPD AND NORMAL SUBJECTS." @default.
- W2079283188 doi "https://doi.org/10.1097/00005768-199805001-01691" @default.
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