Book excerpt: This book offers an overview of some of the core concerns underlying lifelong engagement in sport and physical activity, encompassing every age and phase of engagement. The book explores key models of engagement from around the world, as well as specific areas of research that will help the reader understand this important topic. Lifelong Engagement in Sport and Physical Activity is important reading for undergraduate and postgraduate students in teacher education, sport and coaching science, and for health promoters, coaches, teachers and relevant bodies and organisations in sport and education.