If you suffer the pain and stiffness of arthritis, you may not be enthusiastic about exercising. But arthritis specialists say that's exactly what you need to do.
It's advice that 65-year-old Sibyl Zaden has taken to heart. A former marathon runner and triathlete, Zaden now suffers from osteoarthritis in her shoulders and knees. "My problem is lifting my arm," she says. "It's very painful. I can lift it halfway and that's it."