This book first describes the physical profile of elite young tennis players focusing on the Inertial Movement Analysis patterns. In Inertial Movement Analysis, wearable microsensor technology is used to improve the knowledge about activity patterns such as accelerations, decelerations, jumps and changes of direction. Following this, the authors review the prevalence and risk factors of low back pain in tennis players and discuss the optimal rehabilitation program, focusing on non-operated adolescent/adult tennis players. A methodology for creating educational training programs in volleyball is examined. Algorithmic methodological steps of educational training programs, models and methods that were used in their creation and control, and the calculation and analysis of their effects and changes in volleyball are presented. The game pattern of the 2008 and 2012 Olympic women's volleyball finals between the USA and Brazil is assessed through data obtained from an observational video analysis of the Olympic finals in Beijing and London. Studies on game analysis in volleyball are discussed which identify that the points generated through the fundamentals of attack, block and serve are decisive for a team to achieve victory in high performance volleyball. Thus, the objective of this study was identify the factors that determine victory in high-performance men's volleyball. In the conceptual aspect, the authors discuss the theoretical assumptions of sociology of sport and historical-critical pedagogy, aiming to understand volleyball's history and basic fundamentals. In closing, the relationship between athletes, parents, and coaches is discussed in detail, depending on each individual's expectations and how these expectations influence the self-confidence of volleyball players.