Book excerpt: The ability to effectively use one’s thoughts, emotions and motivation to enhance performance and well-being is one of the most important skills in sport and exercise contexts. Motivation and Self-Regulation in Sport and Exercise explores the theories, research and processes that underpin these self-regulatory and motivational processes. A deeper understanding of motivation and self-regulation has far-reaching implications, from helping individuals to begin an active lifestyle, to seasoned athletes looking for a competitive edge. For the first time, the globally leading researchers in this research field come together to provide their unique, cutting-edge insight into how to exercise or perform more effectively. In doing so, the book provides new insight into established theories of motivation and self-regulation, but also breaks new ground by inspecting lesser-known or emerging paradigms. This book is intended for all scholars interested in self-regulation and motivation, from undergraduate students to experienced researchers, as well as practicing sport and exercise psychologists, coaches and athletes.