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하지 분절 각도에 따른 수의 등척성 수축(MVIC)시 근전도 비교
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  • 하지 분절 각도에 따른 수의 등척성 수축(MVIC)시 근전도 비교
저자명
김정자,이민형,김연정,채원식,한윤수,권선옥,Kim. Jung-Ja,Lee. Min-Hyung,Kim. Youn-Joung,Chae. Won-Sik,Han. Yoon-Soo,Kwon. Sun-Ok
간행물명
한국운동역학회지
권/호정보
2005년|15권 1호|pp.197-206 (10 pages)
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한국운동역학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The purpose of this study was to quantify the maximum EMG levels and determine if there are differences in these EMG levels with respect to different knee flexion angles. Eight university students with no known musculoskeletal disorders were recruited as the participants. The maximum voluntary isometric knee extensions and flexions were taken from each participant sat on the isokinetic exercise machine (Cybex 340) at five different knee flexion angles ($10^{circ}$, $30^{circ}$, $50^{circ}$, $70^{circ}$, $90^{circ}$) After surface electrodes were attached to rectus femoris, vastus medialis, vastus laterlis, biceps femoris, and semitendinosus, maximum EMG levels at five different knee flexion angles were measured. The results showed that there was no significant difference in maximum EMG levels among five different knee flexion angles. Although there was no significant difference in EMG levels and were some variations among different knee flexion angles, the EMG signals of quadriceps in extension and biceps femoris in flexion were the greatest at $30^{circ}$. It seems that different joint angles or relative locations of body segments might affect the magnitude of EMG levels. Because the maximum EMG levels could change with a different knee flexion angle, an attempt should be made to more accurately measure these values. If then, %MVIC measure provides more reliable data and is most appropriate for EMG normalization.