Your calf muscles (also known as the gastrocnemius muscles) simultaneously act as the gas and brake pedal on a run. Need to push up a steep hill? That’s your calf muscle called into action. Need to slow it up during the descent on the other side? This muscle makes sure you don’t face plant on the way down.
Strong calves can give you better running form as you exercise, more power, and faster times. Weak calves are (click to read more)