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:Â Sitting hamstring stretch, Standing hamstring stretch.