Hamstrings

The hamstrings are a group of three muscles located at the back of the thigh, which include:

  1. Biceps Femoris
  2. Semitendinosus
  3. Semimembranosus

Biomechanics and Function

Function: The hamstrings are primarily responsible for knee flexion and hip extension. They play a crucial role in many activities such as running, jumping, and controlling the body during deceleration.

Biomechanics: When the hamstrings contract, they pull the lower leg backward, causing knee flexion. During hip extension, they work with the gluteal muscles to move the thigh backward. The hamstrings also help in the internal and external rotation of the tibia when the knee is flexed.