Physical Therapy Korea (한국전문물리치료학회지)
- Volume 11 Issue 3
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- Pages.85-90
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- 2004
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- 1225-8962(pISSN)
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- 2287-982X(eISSN)
The Effect of the Muscle Firing Rate on Muscle Length
근 길이에 따른 근 섬유 동원률의 차이
- Song, Young-Hee (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
- Chung, Yi-Jung (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
- Cho, Sang-Hyun (Dept. of Physical Therapy, College of Health Science, Yonsei University, Institute of Health Science, Yonsei University)
- Published : 2004.09.17
Abstract
The purpose of this study was to find the difference in muscle firing rate between each muscle according to the knee angle with the quadriceps femoris which is a representative action muscle of the lower extremity. Seven normal healthy subjects were recruited. The median frequency (MDF) of muscle contraction was recorded from vastus lateralis, vastus medialis, and rectus femoris muscles using the surface EMG, in 5 seconds, during maximal isometric knee extension. The data were analyzed by the two-way repeated ANOVA. The results of the study were as follows: 1) median frequency of muscle contraction was significantly higher at the vastus lateralis, vastus medialis, and rectus femoris in descending order. 2) median frequency of muscle contraction was significantly higher at the