What is the muscle behind the knee?

3. Biceps femoris tendonitis (hamstring injury). The hamstring consists of a trio of muscles that run down the back of your thigh: semitendinosus muscle; semimembranosus muscle; biceps femoris muscle. These muscles allow you to bend your knee. read more

Pain behind the knee aka posterior knee pain is a common problem with multiple possible causes. It may develop gradually over time due to an underlying knee condition, or it may develop suddenly, which is usually due to an injury. read more

The muscles of the knee include the quadriceps, hamstrings, and the muscles of the calf. These muscles work in groups to flex, extend and stabilize the knee joint. These motions of the knee allow the body to perform such important movements as walking, running, kicking, and jumping. read more

Excessive running such as in a marathon can lead to pain behind the knee. In addition, bad workout techniques can lead to tendinitis in the legs which can cause a lot of pain. Reactive muscle tone. A reactive muscle from surgery or poor leg function can cause pain behind knee problems. read more

The hamstring muscle group extends across the posterior surface of the thigh from the ischium of the pelvis to the tibia of the lower leg. Three individual muscles form the hamstrings group: biceps femoris, semitendinosus, and semimembranosus. The hamstrings work together to flex the leg at the knee. read more