Hinge joints allow flexion and extension only. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl. The knee ...

"My shoulder hurts when I serve." "My shoulder pain wakes me up if I roll over on that side during the night." Those are two of the most common statements made by tennis players complaining of ...

Four important synovial joints used in most sporting actions are the elbow and shoulder joints in the arm, and the knee and hip joints in the leg. The elbow and knee joints are both hinge joints.

This week, we are going to discuss AC joint separation of the shoulder—a specific injury that occurs when pressure is applied to the shoulder from top to bottom, such as landing on the shoulder ...