In Plain English
The calves are the muscles forming the back of your lower leg, extending from the knee and upper shin to the heel through the Achilles tendon. They consist primarily of the gastrocnemius and soleus, working together to point the foot downward, raise the heel during walking and running, and propel the body forward with every step.
Technical Definition
The calves refer primarily to the gastrocnemius and soleus, collectively known as the triceps surae. The gastrocnemius originates from the posterior femur above the knee, while the soleus originates from the posterior tibia and fibula. Both converge into the Achilles tendon before inserting onto the calcaneus. Together, they produce ankle plantarflexion, generating propulsive force during gait, running, and jumping. Because the gastrocnemius also crosses the knee joint, it additionally contributes to knee flexion.

















