Objectives of the study: to analyze the social, psychological and biological determinants of the activity and success of athletes; Describe the phenomenon of "psychological niches" on the model of sport. The article analyzes the results of a survey of more than 150 people - high-ranking sportsmen, freestyle wrestlers, classical and judo; Polls of coaches of the highest category (12 people); Materials of literary sources. The study showed that in the sport of higher achievements (SHA), the effects of joint activity of the subjects are systematically manifested, the consequence of which is the selection and fixing of athletes with certain individual psychological features (physique, typological properties of the nervous system, functional asymmetry, personal characteristics, styles of activity) in Certain types and specializations. In different sports and specializations, stable proportions of representatives of different types (physique, nervous system properties, functional asymmetry, personal characteristics, and styles) are preserved, as well as the success characteristic of each type in tournaments and different "ranges" of their success. Formed among athletes different types of activity styles are focused on the actualization of different stable segments of "activity spaces". These effects, determined by the interaction of social, psychological and biological conditions, are called "psychological niches", the characteristic features of which are: ordering in space and time of interactions of subjects; A limited set of mutually complementary types of adaptation of subjects in a dynamic environment; Manifestations are not single, but special, typical; Adaptation of subjects to a part of environmental conditions, as a sufficient and necessary condition for their success; Propensity to master subjects by typical operational complexes (systems, "blocks" of actions); Orientation on typical features of partners and environmental conditions; Success with interactions with typical partners (rivals), etc.