Tight calves and shin splints are common issues runners face. But they shouldn’t be the only areas you pay attention to in your lower legs. If you’re ignoring a small stabilizing muscle called the ...

“The posterior tibialis is a muscle that originates on the back, or posterior, part of the tibia and fibula (your lower leg bones), up close to your knee,” explains Cathlin Fitzgerald, D.P.T, C.S.C.S.