기립자세에서 발위치가 무릎 폄근의 등척성수축 근전도 활성도에 미치는 영향

• 영문명: The Effects of Foot Position on Electromyographic Activity of Knee Extensors in Standing
• 발행기관: 한국전문물리치료학회
• 저자명: 김성중(Kim Seng-jung) 권오윤(Kwon Oh-yun) 조상현(Cho Sang-hyun) 황지혜(Hwang Ji-hye)
• 간행물 정보: 『한국전문물리치료학회지』한국전문물리치료학회지 제8권 제2호, 1~16쪽, 전체 16쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2001.06.30

영문 초록

This study was designed to identify the effects of foot position on electromyographic (EMG) activity of the quadriceps femoris during maximum voluntary contraction (MVC) in standing. Twenty young adults who had not experienced any knee injuries were recruited. Their Q-angles were within a normal range. They were asked to stand in five different foot positions (40° externally rotated, 30°internally rotated, neutral, 20°plantarflexed, and 10°dorsiflexed foot position). The EMG activities of the vastus lateralis (VL), rectus femoris (RF), and vastus medialis oblique (VMO) were recorded in standing by surface electrodes and normalized by MVC EMG values derived from manual muscle test. The normalized EMG activity levels (%MVC EMG) of muscles in the five foot positions were compared using repeated measures ANOVA. The EMG activity levels of the VL, RF, and VMO were the highest when foot was externally rotated. The EMG activity levels of the VL and RF were significantly different among the foot positions (p<.05). However, EMG activity levels of the VL, RF, VMO, and VMO/VL ratio did not show significant differences in each foot position (p> .05). The results suggest that the quadriceps femoris may be effectively activated by performing MVC at an externally rotated foot position. Therefore, the externally rotated foot position can be considered as an effective foot position for quadriceps femoris strengthening exercise. Further studies are needed to identify whether there are differences in the effects of foot position on muscle strength after MVC exercise of quadriceps femoris in standing.

목차

Abstract

Ⅰ. 서론

Ⅱ. 연구방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

인용문헌

키워드

Quadriceps femoris Electromyography Muscle strengthening Foot position