The hamstring muscles are along the back of the thigh, according to the American Academy of Orthopaedic Surgeons. The muscles extend from below the pelvis to above the shinbone.
The hamstring muscle group has three components: semitendinosus, semimembranosus and biceps femoris. All three muscles attach at the ischial tuberosity near the thighbone and continue down past the knee, explains the American Academy of Orthopaedic Surgeons. Hamstring tendons serve as the connectors between muscle and bone. This muscle group is responsible for bending the knee joint and extending the leg backward.
Athletes often suffer from hamstring injuries, with pain typically occurring near the ischial tuberosity attachment site, states Runner's World.