The muscle — usually the calf at the back of the lower leg — tightens and spasms. Nocturnal leg cramps are common, with a high prevalence in older people. Many people with PAD are asymptomatic.

This muscle helps to move and stabilize the lower leg and the ankle joint. A common cause of calf pain is muscle strain, which can happen from doing cardio activities like running or jumping ...

There are two heads to the muscle, the lateral head which sits on the outside of the lower leg and the medial head that sits on the inside of the leg. The two heads can both work together.

When you hop, run or jump, your legs behave like springs, absorbing and returning energy with each step. But what happens to ...