Biceps Femoris The biceps femoris is one of the three hamstring muscles located at the back of the thigh. It has two parts: the long head, which originates from the ischial tuberosity (pelvis), and the short head, which originates from the femur (thigh bone). Both parts merge to attach at the fibula (one of the lower leg bones). The biceps femoris plays a crucial role in knee flexion (bending the knee) and hip extension (straightening the hip), contributing to movements like walking, running, and jumping.

Semitendinosus The semitendinosus is one of the three hamstring muscles located at the back of the thigh. It is a long, slender muscle that runs along the inner part of the posterior thigh, originating from the ischial tuberosity (pelvis) and attaching to the tibia (shin bone). The semitendinosus is involved in knee flexion (bending the knee) and hip extension (straightening the hip), and it helps stabilize the pelvis during movement.

Semimembranosus The semimembranosus is one of the three hamstring muscles located at the back of the thigh. It is a broad, flat muscle that lies beneath the semitendinosus. Originating from the ischial tuberosity (pelvis), it attaches to the medial condyle of the tibia (shin bone). The semimembranosus plays a key role in knee flexion (bending the knee) and hip extension (straightening the hip), and it helps with the stabilization of the pelvis and knee joint during movement.