Calf and shin mass
Short definition
Combined muscle mass of the lower leg (calves, soleus, anterior group).
Full definition
Lower-leg groups: posterior — gastrocnemius and soleus; anterior/lateral — tibialis anterior, extensor digitorum longus, peroneals. Functions: plantar and dorsiflexion of the ankle, foot/leg stabilization, spring-loaded work in walking and running. Calf + soleus mass ≈ 1.2–1.8 % at 20–25 % body fat, the anterior group less. Trained by calf raises (standing — gastroc, seated — soleus).
Examples
Standing calf raise — gastrocnemius; seated — soleus.