A medial collateral ligament sprain may be very painful, and the knee may not work as it should. Learn about the causes, symptoms, and treatment for this injury.

This exercise helps keep your back flexible.

Lumbosacral strain is a medical term for an injury that causes low back pain. The lumbosacral area (low back) is between the bottom of the ribcage and the top of the buttocks. A strain is tearing of muscles and tendons.

Follow the step-by-step instructions for this shoulder exercise.

The glenohumeral joint is the main joint in the shoulder. With osteoarthritis, the parts of the joint wear down and cause pain, stiffness, and limited movement.

Follow the step-by-step instructions for this thigh exercise.

A gastrocnemius muscle tear is a severe, sudden injury to your calf muscle.

Follow the step-by-step directions for this ankle exercise.

A fifth metatarsal fracture is a type of broken bone in your foot. The fifth metatarsal connects your smallest toe to your ankle. These bones help with arch support and balance.

Follow the step-by-step instructions for this stretch.