Many people blame their chair, mattress, or posture for back pain—but health experts say a common muscle problem caused by ...

A pulled muscle is an injury to your muscle fibers. Muscle fibers are the large cells that make up your muscles. Your muscles allow you to move when they contract and relax. Many people use the terms ...

Hip pain can start in different ways. It may build slowly over months, or hit after a long walk, hard workout, or awkward twist. Some people notice it in the groin. Others notice it on the outside of ...

and into the painful muscle. The hip joint can withstand repeated motion and a fair amount of wear and tear. As the largest ball-and-socket joint in the body, its structure allows for fluid movement.

SAN ANTONIO — San Antonio Spurs guard Stephon Castle is expected to miss two to three weeks after an MRI revealed a left hip flexor strain. Castle underwent the MRI on Monday, a day after sitting out ...