The hamstrings consist of three primary muscles located at the back of the thigh: the biceps femoris, semitendinosus, and semimembranosus. These muscles work together to facilitate knee flexion and hip extension. The biceps femoris has two heads (long and short), while the semitendinosus and semimembranosus are located medially. Collectively, they play a crucial role in various movements, including running and jumping.
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