Semitendinosus

Semitendinosus Muscle

When running the hamstrings act eccentrically to slow down the knee extension motion. Hamstring strains are common in individuals with chronically tight hamstrings or who do not warm-up thoroughly.

Origin : Ischial tuberosity.

Insertion : Upper medial surface of the tibia.

Actions : Hip extension.
Knee flexion.
Internal rotation of the hip when the knee is flexed.

Innervation : Tibial part of the sciatic nerve.

Daily uses : Bending the knee to step over something.

Example strengthening exercises : Knee curl with resistance band.
Nordic curl.

Example stretches : Sitting hamstring stretch.
Standing hamstring stretch.