Fit & Strong! is an evidence-based 12-week physical activity/self management program that targets people with lower extremity osteoarthritis. It meets 2x per week for 90 minutes per session. The first hour is comprised of exercise incorporating stretching and flexibility, low-impact aerobics/fitness walking, strength training, and balance exercises, followed by health education/group problem solving for behavior change. Although the program lasts only 12 weeks, it has been shown to significantly increase engagement in physical activity out to 18 months, accompanied by significant improvements in lower extremity joint stiffness, pain and function; lower extremity strength, mobility, and anxiety/depression. Participants learn about the benefits of physical activity, how to manage arthritis, how to exercise safely, and how to develop and maintain a healthier, more active lifestyle – without pain.