“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.

The best part? You can do these in the comfort of your bedroom. Though they power most upright movements, the calf muscles are often overlooked in stretching routines. But tight or stiff calves can ...