A calf strain is an injury to the muscles in the back of your leg, below the knee. The calf is made up of 9 muscles. It is possible to injure 1 or more of these muscles at the same time. Calf strains can occur when a person is performing high-speed motions like running and jumping.

How do you know if you have a strained calf?

Muscle pain when flexing your ankle or pointing your toes. Problems bending your knee. Snapping or popping sensation in your calf. Sudden pain in the back of your lower leg.

Where are calf strains mostly found?

Calf strains are most commonly found in the medial head of the gastrocnemius [3]. This injury was first described in 1883 in association with tennis and is commonly called tennis leg [6].