M. semitendinosus


German: Hemi-tendon muscle

  • to the thigh muscles overview
  • to the musculature overview


On the tibial (shin) side of the lower half of the thigh is the semitendinosus muscle (hemi-tendon muscle)

You can find more helpful information here:

  • Meniscal tear
  • Knee osteoarthritis
  • Hip arthrosis

Approach, origin, innervation

Approach: Medial (in the middle of the body) next to the roughness of the shin (Tibial tuberosity)

Origin: ischial tuberosity (Sciatic tuberosity)

Innervation: N. tibialis, L 4 - 5, S 1 - 2

How is the muscle trained / contracted?

The semitendinosus muscle (half tendon muscle) contracts by stretching the hip joint and flexing the knee joint.

This results in the following exercises:

  • Squats
  • Leg press
  • Hamstrings

For more information, see Weight Training

How is the muscle stretched?

The stretching exercises for the back of the thigh are found to be very uncomfortable by many. The athlete stands with his legs closed and straight and tries to touch the tips of his toes with his fingers. The back should be kept straight.

See stretching for more information

Note: Athletes who cannot perform this exercise usually do not have a shortened muscle, but only immobility.

In addition to the semitendinosus muscle, this exercise also stretches the biceps femoris and semimemranosus muscles.


The semitendinosus muscle causes the lower leg to flex. It also functions as an internal rotator of the knee joint and extensor of the hip joint.