There are three muscles in the legs that are collectively referred to as the Hamstrings – the Biceps Femoris, Semitendinosus and Semimembranosus. All three Hamstrings attach to the Ischial Tuberosity of the pelvis – the sit-bone. At the knee, the Biceps Femoris attaches to the outside of the Femur and the knee and the Semitendinosus and Semimembranosus together are attached to the inside of the knee. The Hamstrings can be visualized as forming a tripod with the knee as the…