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.


  • Ischial tuberosity


  • Upper medial surface of the tibia


  • Hip extension
  • Knee flexion
  • Internal rotation of the hip when the knee is flexed


  • Tibial part of the sciatic nerve

Daily uses

  • Bending the knee to step over something

How can I stretch it?

How can I strengthen it?

  • Knee curl machine
  • Hip extension using body weight
  • Hip extension using a resistance band

More Human Muscles: