Athletes are naturally exposed to significant psychological challenges in sports, but do not wait helplessly for the assistance of sports psychologists or trainers. Instead, they practise one form or another of self-regulation. Self-talk in Sport explores one such self-regulatory strategy: self-talk, the inner voice that accompanies every human being throughout their lives. Over time, research has revealed many secrets of self-talk in sport, though many others remain unveiled. This book offers you the opportunity to discover the multiple identities of our self-talk, how the “inner coach” serves as a rational counterpart to the irrational self, and what we need to do to develop our inner voice to reach its maximum self-regulatory potential. There is a general need for concrete interventions in sport, exercise, and performance psychology. In addition, the autonomous functioning of people is a central aim of psychological interventions that align with positive psychology and focus on people’s strengths rather than weaknesses. In this volume, researchers and applied practitioners are shown how they can use self-talk interventions to strengthen people’s rational self-regulation in order to deal with a variety of situations that apply to both sport and other exercise and performance contexts. Since self-talk is a tangible result of cognitive processes and inner experiences that researchers and applied practitioners can barely access, Self-talk in Sport is a tool for sports psychologists to understand and interact with hidden parts within athletes that have a major impact on sport and exercise experiences and performance. A book demonstrating the diverse – both rational and irrational identities – of self-talk, as well as specific interventions to change the inner dialogue of athletes, is a fundamental piece in the education of sport scientists.