Intersession reliability of the electromyographic signal during incremental cycle ergometry: Quadriceps Femoris

Authors

  • Liesle A. Travis SPT,

    1. Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA
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  • Steven J. Arthmire SPT,

    1. Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA
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  • Ahmed M. Baig SPT,

    1. Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA
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  • Allon Goldberg PhD, PT,

    1. Mobility Research Laboratory, Wayne State University, Detroit, Michigan, USA
    2. Institute of Gerontology, Wayne State University, Detroit, Michigan, USA
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  • Moh H. Malek PhD

    Corresponding author
    1. Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA
    • Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA
    Search for more papers by this author

Abstract

Introduction:

The purposes of this investigation were to determine the: (1) reproducibility of the patterns of responses for electromyographic (EMG) amplitude and mean power frequency (MPF); and (2) intraclass correlation coefficient (ICC) of the EMG amplitude and MPF during three incremental cycle ergometer tests separated by 48 hours.

Methods:

Ten men performed incremental cycle ergometry tests to exhaustion on three separate occasions. Surface EMG signals were recorded simultaneously from the three superficial quadriceps muscles at each trial.

Results:

Polynomial regression indicated that, for >95% of the cases, the best-fit model was the same at each trial for EMG amplitude but not for EMG MPF. The ICC values were high for EMG amplitude but low for EMG MPF.

Conclusions:

These results indicate that EMG amplitude is a reliable measure of motor unit activation strategy during incremental cycle ergometry, whereas the EMG MPF was unreliable. Muscle Nerve 2011

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