Soleus is a large large muscle, deep to Gastrocnemius. Together the Gastrocnemius, Soleus and Plantaris are known as Triceps Surae. Soleus is used constantly in standing to maintain an upright position.
Origin : Upper half of the posterior surface of the tibia, along the soleal line.
Upper third of the posterior fibula.
Insertion : Posterior surface of the calcaneus via the achilles tendon.
Actions : Plantar flexion.
Innervation : Tibial nerve.
Daily uses : Standing upright.
Example strengthening exercises : Seated calf raises.
Example stretches : Soleus stretch.
Related injuries : Calf strain.