曲膝的一组肌肉

腿后腱由三种肌肉组成,分别为股二头肌、半膜肌和半腱肌,半腱肌及半膜肌位于大腿后方内侧,而股二头肌位于大腿后方外侧。此三者可使膝弯曲或屈曲,并辅助使腿伸直。坐在椅子上并伸直双腿,就可感受到这个强而有力的腱。

Template:Muscle

In human anatomy, a hamstring is any of the three tendons contracted by three posterior thigh muscles (semitendinosus, semimembranosus and biceps femoris), and the term is often also used to refer to the muscles themselves. The hamstring tendons make up the borders of the space behind the knee; the muscles are involved in knee flexion and hip extension.