Reversal theory is an innovative psychological theory exploring human motivation, emotion and personality. This book examines how reversal theory can be used by practitioners in applied sport psychology in their counselling work and athletes. The work comprehensively explores the key elements of reversal theory, and demonstrates how it can improve understanding in the following areas: athlete's motivational states when performing; athlete's motivational characteristics; identifying performance problems; athlete's experiences of stress; intervention strategies; eating disorders; and exercise addiction. Each chapter includes real-life case study material from elite performers in sport, as well as guides to further reading and questions for discussion.