Origin
Long head—ischial tuberosity, sacrotuberous ligament Short head—linea aspera, lateral supracondylar ridge, lateral intermuscular septum
Insertion
Lateral side of head of fibula and lateral condyle of tibia
Actions
Flexes leg, long head also extends thigh
Nerve
Long head—tibial part of sciatic nerve (S1–S3) Short head—common peroneal part of sciatic nerve (L5, S1, S2)
Note
During walking or running, the Hamstrings – Group description are used to slow down the leg at the end of its swing and prevent the trunk from flexing at the hip. They are susceptible to being strained by resisting the momentum of these body parts.
