The textbook, which consists of two books, on the basis of modern scientific data reveals the theoretical and practical foundations of sports selection. Here the theoretical principles of sports selection are given, the systems of sports selection practiced in the developed countries of the world are considered. The structure and genetics of sports abilities are determined, organizational and methodical bases of sports selection are given, and also diagnostics of development of general and special abilities of sportsmen is given. For students and teachers of higher educational institutions of physical education and sports, coaches, sports doctors, scientists, athletes.