This textbook is aimed at students of psychology and sports science, as well as individuals working in sports practice who wish to gain a deeper and more comprehensive understanding of sports psychology topics. Numerous engaging didactic elements facilitate easy and enjoyable learning of complex concepts. In the first part, you will explore the diverse facets of sports psychology and the inseparability of theory and sports practice. Theoretical foundations are organized according to the subdisciplines of psychology (cognition, motivation, emotion, personality, and social processes) and are explained in a clear and practical manner. Questions addressed include: What cognitive processes lead to good decisions in critical sports situations? How does intrinsic motivation for sports develop? What are the consequences of competition anxiety? Does sports contribute to personality development? How are team climate and athletic performance related? In the second part, you will learn everything important about the application of sports psychology in the contexts of performance and health. For example, what do theory-based psychological training programs for performance enhancement in elite sports look like, and how effective are they? Is there a connection between sports and health? The chapters written by respective subject experts provide a comprehensive and optimal preparation for exams. Additionally, the clear structure and didactics, along with the self-contained chapters, help you focus on specific content areas when deepening your understanding or reviewing material. The work is relevant for exams and also stimulates further thought with valuable insights.