등척성 스쿼트 운동 시 다양한 자세가 안쪽빗넓은근과 가쪽넓은근의 근활성도 및 근활성비에 미치는 영향
Effects of Various Postures on EMG Activity and Ratio of the Vastus Medialis Oblique and Vastus Lateralis during Isometric Squat Exercise
The purpose of this study was to investigate the effects of various posture in squat exercises on muscle activations of vastus medialis oblique (VMO) and vastus lateralis (VL). There was to suggest the optimal training posture of squat exercise for healthy young women, athletics, or patellofemoral pain syndrome. Twenty-four healthy young adults participated spontaneously in this study, and had no medical history of anterior knee pain or any lower extremity disorders. Surface electromyography (EMG) was used to collect the data of muscle activation in VMO and VL. Surface EMG data were collected at each angle in dominant knee joint (15, 35, and 60 degrees) and foot positions (internal rotation, neutral, and external rotation). The normalized EMG activity levels (%MVIC) of the VMO and VL were compared using two-way ANOVA with repeated measures. There was significant main effects of knee joint angles and foot positions, and interaction effect on EMG activities of VMO and VL. VMO/VL ratios by different foot position. There was an interaction effect between knee joint angles and different foot position. A externally rotated foot position produced significantly more VMO/VL activity ratio than that from internally rotated position and neutral position, although there was not significantly different in the three angles in knee joint. These findings suggest that squat exercise at externally rotated position is the effective way. The results of this study are also to suggest the optimal training posture of squat exercise is externally rotated foot position for healthy young women, athletics, or patellofemoral pain syndrome.
학제간 연구를 통해 시민의 삶의 질을 높이는데 초점을 두며 인문과학, 사회과학, 자연과학, 신학분야의 전문가들이 참사랑에 바탕을 둔 전공의 심화와 학문적 협동을 통해 시민의 정신적, 신체적, 사회적, 환경적, 영적 고통을 치유하고 시민의 마음 몸 사회 환경의 건강 곧 전인건강을 증진하는 지식의 생산과 교류 및 전달에 그 목적을 둔다.