In this video, Mayo explains how physical therapy can help strengthen arthritic joints.

While tennis will help strengthen your muscles and joints, you will probably still need to do some supplemental training to improve strength.

Some people also use it for strengthening bones, joints, and fingernails.

Strengthening bones and joints.

Physical therapy to strengthen muscles and joints is very helpful.

Dr. Pyotr D. Moncarz, principal engineer of Failure Analysis Associates, said today that the nature of the damage and the way the earthquake struck suggested that the elevated highway failed because cables installed to strengthen key joints had not been strong enough to withstand the unusual stress.

"Eddie George, a running back for the Tennessee Titans, uses yoga to strengthen his lower body, legs, knees and joints," Mr. Solan said.

Finding him very attractive, she claims that as his bones start to mend, tap-dancing is a wonderful way to strengthen his muscles and joints.

How it strengthens joints ( :34 )