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对12侧人大腿肌的构筑研究表明，股四头肌的生理横切面积是臀大肌或腓肠肌的3倍。伸膝肌远较屈膝肌强大是人类骨骼肌的特征之一。绳肌中，股二头肌长头和半膜肌提供主要肌力，股二头肌短头和半腱肌都是速度型肌，分别对前者的力度和方向进行调节。内收肌群各肌的肌纤维长度、羽状角自上而下逐渐增大，适应干下肢以髋关节为中心的收、展运动，也表现为强化髋和膝的稳定性。本文测定了大腿各肌在解剖方位下的肌节长。
Research on the construction of the thigh muscle of 12 sides shows that the quadriceps physiologic cross-sectional area is 3 times larger than that of the gluteus maximus or gastrocnemius muscle. Extensive knee extensor than knee flexor muscle is one of the characteristics of human skeletal muscle. Rope muscle, biceps femoris and semimembranosus provide the main muscle strength, short biceps femoris and semitendinosus are speed-type muscle, respectively, the former intensity and direction of regulation. Adductor muscle muscle muscle fiber length, feather angle gradually increased from top to bottom, to adapt to the lower extremity hip joint as the center of the collection, exhibition exercise, also showed enhanced hip and knee stability. This article measured the sarcopenia of the thigh muscles in the anatomic position.