Based on decades of scientific research and clinical experience, this book provides a scientifically supported and clinically relevant source of information to promote physical activity in overweight and obese youth of all ages, including children with significant obesity and chronic health conditions, such as hypertension, asthma, and type 2 diabetes. The book presents a best practices model for implementing clinical- and recreational-based physical activity interventions. It covers aerobic, strength, and flexibility training; motivation techniques; tracking techniques; outcome measurements; and future trends in exercise research for overweight youth.