Which group of muscles includes the semitendinosus?

The semitendinosus is a member of the hamstrings group of muscles, which also includes the semimembranosus and the biceps femoris. These muscles are located in the posterior compartment of the thigh and are primarily responsible for knee flexion and hip extension. The semitendinosus specifically assists in these movements while also playing a role in the internal rotation of the knee when the leg is flexed.

To understand the context better, the quadriceps group is situated in the anterior compartment of the thigh and is responsible for extending the knee. Adductor muscles are primarily located in the medial thigh and primarily function to bring the legs together or adduct the hip. The calf muscles, found in the posterior compartment of the lower leg, are responsible for plantar flexion of the ankle and do not include any thigh muscles.

Given that the semitendinosus is directly involved in actions associated with the hamstrings, the identification of this group as including the semitendinosus is clear and accurate.