Osteoarthritis (OA) is the most common joint disorder. It is a normal result of aging, but it is also caused by wear and tear on a joint. The disease is more common in women than men. The symptoms usually start in middle age and almost everyone has some symptoms by age 70. Hear from experts on what you can do at any age to prevent or delay OA’s onset, and also the latest therapies, medications and surgical options to help make sure your joints keep up with the rest of you.