In humans and some other mammals, the soleus is a powerful muscle in the back part of the lower leg . It runs from just below the knee to the heel, and is involved in standing and walking. It is closely connected to the gastrocnemius muscle and some anatomists consider them to be a single muscle, the triceps surae. Its name is derived from the solefish whose shape it resembles....
The soleus muscle is not on your shin: it's the broad, flat, muscle that underlies the more prominent gastrocnemius muscle (which comprises the main bulk of the calf).
If it is...