Kimura Atsushi
Department of Rehabilitation, Medical Education and Research Center, Meiji University of Integrative Medicine.
J Phys Ther Sci. 2013 Jun;25(6):697-703. doi: 10.1589/jpts.25.697. Epub 2013 Jul 23.
[Purpose] This study investigated the effects of hamstring stretching on leg rotation during active knee extension. [Subjects] Subjects were 100 bilateral legs of 50 healthy women without articular disease. [Methods] Hamstring hardness, leg rotation and muscle activities of the knee extensors during active knee extension were measured before and after hamstring stretching. [Results] Hamstring hardness was significantly decreased after hamstring stretching. The leg rotation angle, variation in leg rotation angle, variation in leg external rotation angle, and muscle activities of the vastus lateralis and rectus femoris were significantly increased after hamstring stretching. A moderate positive correlation was found between variation in leg rotation and variation in muscle hardness in hamstring. [Conclusion] Leg rotation during active knee extension was increased by hamstring stretching. Hamstring stretching would be effective as a pretreatment for restoring proper leg rotation when knee extension is conducted as a therapeutic exercise.
[目的]本研究调查了腘绳肌拉伸对主动伸膝过程中腿部旋转的影响。[对象]研究对象为50名无关节疾病的健康女性的100条双侧下肢。[方法]在腘绳肌拉伸前后，测量腘绳肌硬度、主动伸膝过程中腿部旋转及膝伸肌的肌肉活动。[结果]腘绳肌拉伸后，腘绳肌硬度显著降低。腘绳肌拉伸后，腿部旋转角度、腿部旋转角度变化、腿部外旋角度变化以及股外侧肌和股直肌的肌肉活动均显著增加。发现腿部旋转变化与腘绳肌肌肉硬度变化之间存在中度正相关。[结论]腘绳肌拉伸增加了主动伸膝过程中的腿部旋转。当进行伸膝作为治疗性运动时，腘绳肌拉伸作为恢复腿部正常旋转的预处理将是有效的。
