Correlation between muscle metabolism and changes in M-wave and surface electromyogram: Dynamic constant load leg exercise in untrained subjects

Authors

  • S. Arnaud MD,

    1. Laboratoire de Physiopathologie Respiratoire, Institut Jean Roche, Faculté de Médecine, Bd Dramard, 13916 cedex 20 Marseille, France
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  • M.C. Zattara-Hartmann MD,

    1. Laboratoire de Physiopathologie Respiratoire, Institut Jean Roche, Faculté de Médecine, Bd Dramard, 13916 cedex 20 Marseille, France
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  • Ch. Toméi PhD,

    1. Laboratoire de Physiopathologie Respiratoire, Institut Jean Roche, Faculté de Médecine, Bd Dramard, 13916 cedex 20 Marseille, France
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  • Y. Jammes MD

    Corresponding author
    1. Laboratoire de Physiopathologie Respiratoire, Institut Jean Roche, Faculté de Médecine, Bd Dramard, 13916 cedex 20 Marseille, France
    • Laboratoire de Physiopathologie Respiratoire, Institut Jean Roche, Faculté de Médecine, Bd Dramard, 13916 cedex 20 Marseille, France
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Abstract

In untrained subjects exercising on a cycle at constant work loads presented at a sub- or suprathreshold level, reduced M wave amplitude with lengthening of duration was measured in vastus lateralis muscle during and after suprathreshold exercise. M wave changes were correlated with increased blood lactate concentration. At the two work load levels, the increase in root mean square of EMG was rapidly closely adjusted to that of oxygen consumption, confirming the reality of adaptative reflex mechanisms in leg muscles during cycling. © 1997 John Wiley & Sons, Inc. Muscle Nerve 20:1197–1199, 1997

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