 Osteoarthritis OA is the most common joint-related disease and most prevalent form of arthritis in the United States. Pain relievers and anti-inflammatory medications are the most commonly prescribed treatments for OA. These medications, however, cannot completely alleviate OA symptoms. Additional recommended strategies for managing OA include physical and occupational therapy, exercise, and patient education. This study will compare the effectiveness of a physical training program, a self-management training program, and a program including both physical and self-management training for improving physical function in people with early stage knee OA. 