[Lee Stewart]

Cracking your knuckles will give you arthritis.

This was probably told to you by people who can't stand the sound of bones popping, cracking your knuckles or other body parts will not give your arthritis. Dr. Robert Klapper, an orthopedic surgeon at Cedars-Sinai Medical Center and co-director of their Joint Replacement Program, explained on the hospital's site that there is no harm to cracking your knuckles. "The noise of cracking or popping in our joints is actually nitrogen bubbles bursting in our synovial fluid," he wrote. "It does not lead to arthritis."