Gastrocnemius is the largest and most superficial of the calf muscles. Together the Gastrocnemius, Soleus and Plantaris are known as Triceps Surae. The Gastrocnemius is the main propellant in walking and running.
Origin - Lower posterior surface of the femur above the medial condyle.
Lateral condyle of the femur.
Insertion - Posterior surface of the calcaneus via the achilles tendon.
Actions - Plantar flexion.
Innervation - Tibial nerve.
Daily uses - Standing on tip toes.
Example strengthening exercises - Calf raises.
Example stretches - Gastrocnemius stretch.