The hamstring muscles, or, knee flexor muscles are a group of three muscles located in the posterior thigh region on both sides of the body. These muscles are loaded with fast twitch fibers and are a must for an athlete to exercise if they want to increase running speed. Their names are: 1) Semitendonosus, 2) Biceps Femoris and 3) Semimembranosus and are shown below in Figure 1. Figure 1. The Hamstring Muscle, or, Knee Flexors. Innervation, or, Nerve Supply of the Hamstring Muscles The nerve supply to the hamstring muscles is supplied by the great sciatic nerve. It is the… read more
