An Electromyographic Analysis of Muscle Endurance of Quadriceps Femoral Muscles

DOI 2 Citations 8 References
  • YURI Makoto
    Department of Rehabilitation, Hokkaido University Hospital

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Other Title
  • 大腿四頭筋の筋持久力に関する筋電図学的考察
  • ―open kinetic chainとclosed kinetic chainの比較―
  • ―Comparison of Open Kinetic Chain and Closed Kinetic Chain―

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Description

Comparison of the electromyography fatigue patterns of quadriceps femoral muscles during open kinetic chain and closed kinetic chain has not been reported. The purpose of this study, therefore, was to investigate the effects of exercise posture on the electromyography fatigue patterns of quadriceps femoral muscles during isometric knee extension and one-legged standing. All measurements were performed on healthy male subjects. Surface electromyography was recorded during the contractions of the vastus medialis, rectus femoris and vastus lateralis muscles. The tasks were one-legged standing and continuous isometric knee extension maintained for 2 minutes. The values of the average electromyography and median power frequency during the tasks were then calculated. The results of this study indicated that the muscle activity of quadriceps was almost equal in the beginning of each task. During one-legged standing, the average electromyography of each muscle was not increased at the end of the task. However, during isometric knee extension, the average electromyography of each muscle was significantly increased at the end of the task. During isometric knee extension, the median power frequency of each muscle was significantly decreased, and that of rectus femoris during one-legged standing was significantly decreased. This results suggest that the muscle fatigue pattern of quadriceps femoral muscles is different between open kinetic chain and closed kinetic chain.

Journal

  • Physical Therapy Japan

    Physical Therapy Japan 29 (1), 19-23, 2002-02-20

    Japanese Society of Physical Therapy

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