Choi Yoonhee, Lee Sangyong
Department of Physical Therapy, Graduate School of Deajeon University, Republic of Korea.
Department of Physical Therapy, U1 University: 12 Youngdong-eup, Youngdong-gun, Chungbuk 370-701, Republic of Korea.
J Phys Ther Sci. 2017 Nov;29(11):1947-1949. doi: 10.1589/jpts.29.1947. Epub 2017 Nov 24.
[Purpose] This study compared the activity of the quadriceps femoris muscle according to the angle of ankle abduction during a lunge exercise. [Subjects and Methods] Fifteen male healthy volunteers participated in the study. All participants performed the lunge exercise with different angles of ankle abduction (0°, 20°, 40°, 60°). The activity of the rectus femoris (RF), vastus lateralis (VL) and vastus medialis oblique (VMO) muscles were recorded for the four angles by using a surface electromyography system. [Results] There were significant differences between the rectus femoris (RF), vastus lateralis (VL) and vastus medialis oblique (VMO) with every angle of the ankle joint. The most significantly increased muscle activity was evident in the vastus medialis oblique (VMO) when the ankle abduction was 60°. [Conclusion] These findings suggest that as the ankle abduction angle increases during the lunge exercise, the muscle activity of the quadriceps femoris muscle increases and this could be helpful in the selective muscle strengthening of the vastus medialis oblique muscle (VMO) with the ankle in the 60° abduction position.
[目的] 本研究比较了弓步蹲运动中股四头肌的活动情况与踝关节外展角度的关系。[对象与方法] 15名男性健康志愿者参与了本研究。所有参与者以不同的踝关节外展角度（0°、20°、40°、60°）进行弓步蹲运动。使用表面肌电图系统记录四个角度下股直肌（RF）、股外侧肌（VL）和股内侧斜肌（VMO）的活动情况。[结果] 踝关节的每个角度下，股直肌（RF）、股外侧肌（VL）和股内侧斜肌（VMO）之间均存在显著差异。当踝关节外展60°时，股内侧斜肌（VMO）的肌肉活动增加最为显著。[结论] 这些研究结果表明，在弓步蹲运动中，随着踝关节外展角度的增加，股四头肌的肌肉活动增强，这可能有助于在踝关节处于60°外展位时选择性地增强股内侧斜肌（VMO）的力量。
