Journal of the Korean Academy of Clinical Electrophysiology (대한임상전기생리학회지)

The Korean Academy of Clinical Electrophysiology (대한임상전기생리학회)
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Changes in Electromyogram Signals from the Tibialis Anterior Muscle Resulting from Maximal Voluntary Contraction Exercise

최대수의적 수축훈련에 의한 앞 정강근의 근전도 신호의 변화

  • Song, Su-Young (Department of Physical Therapy, Graduate School, Kwangju Women's University) ;
  • Hwang, Ki-Kyeong (Department of Physical Therapy, Graduate School, Kwangju Women's University) ;
  • Kim, Moon-Jeong (Department of Physical Therapy, Graduate School, Kwangju Women's University) ;
  • Lee, Jeong-Woo (Department of Physical Therapy, Kwangju Women's University)
  • 송수영 (광주여자대학교 대학원 물리치료학과) ;
  • 황기경 (광주여자대학교 대학원 물리치료학과) ;
  • 김문정 (광주여자대학교 대학원 물리치료학과) ;
  • 이정우 (광주여자대학교 물리치료학과)
  • Received : 2011.11.15
  • Accepted : 2011.12.09
  • Published : 2011.12.31
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Abstract

Purpose : This study aims to examine changes in electromyogram (EMG) signals detected from the tibialis anterior muscle during repetitive contraction exercises in normal female adults. Methods : The subjects of this study were 10 normal adult females without any musculoskeletal or nervous system disorders. A total of 30 contractions were made repetitively with maximal voluntary contraction exercise for six seconds and a resting time for three seconds. Changes in muscle contractions were measured using dynamometer and EMG signals such as root mean square (RMS), integrated EMG (IEMG), and median frequency (MDF). Results : The result of measurement showed no significant differences in IEMG and RMS in accordance with the increase in the number of contractions. MVIC and MDF showed significant differences in accordance with the increase in the number of contractions (p<0.05). Conclusion : This study demonstrated that repetitive tibialis anterior muscle contraction resulted in a significantly different MVIC and MDF but no significant differences in IEMG and RMS. Therefore, compared to other lower leg muscles, the tibialis anterior muscle is a low-frequency muscle and therefore electrophysiological characteristics of the muscle should be considered in different exercise methods.

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