After a thorough research with the method of model demo,biomechanics analysis and electromyography study,it is demonstrated that ischiocrural and gastrocnemius have no function of knee extension.

• 采用模型演示、生物力学分析和肌电图研究等方法,对股后肌群及腓肠肌有无伸膝作用的问题进行了研究。