ACTION: Flexes the ankle
REFERRAL: Posterior ankle

COMMENTS: These two muscles, the gastrocnemius and the soleus, connect to the calcaneus via the achilles tendon. Achilles tendonitis can be helped by relieving tension on both these muscles. Trigger points in the heads of the gastrocnemius actually refer into the posterior knee. One trigger point in the upper soleus refers pain into the lower back (this trigger point is not shown). the lowest trigger point in the soleus refers to the posterior heel. It should be checked in runners who complain of lower back pain.