The main factor in the development of team game sports, including basketball, is the presence of globalization, professionalization and commercialization processes, which significantly affects the performance of national teams in the most important international starts. Changes in the system of competitive basketball activities have led to a significant expansion of the system of international competitions, which requires from coaches a reasonable approach to the formation of national teams as a basis for successful performance in the Games of the Olympics and World Championships. Material and Methods. The study analyzed the competitive performance of 21 men's and 19 women's national basketball teams that participated in the Olympic Games and World Championships from 1936 to 2020. In order to determine the peculiarities of the formation of national teams in basketball, we analyzed the data of 264 players (men and women) who became medalists of the Olympic Games in the period from 1976 to 2024. Results. The results of the study indicate that the main leaders in modern basketball are the USA men's and women's national teams with the highest percentage of winning medals in the Olympics (31.7% and 30.5%) and World Championships (21.0% and 24.6%). The main focus of the formation of the USA national teams for participation in the Olympic Games coaches - the availability of experience in international competitions (the number of Olympic cycles that the athlete spent as a member of the national team) and the age of athletes. Based on the performance of the men's and women's teams, a trend of increasing number of athletes over the age of 32 is identified, where the maximum value for men (5 players) is observed in 2024 and for women (4) in 2016. Conclusions. The analysis of basketball development shows that the use of modern international experience in the rational formation of national teams allowed to establish that the integral component is the age of players, professional experience of participation in international competitions as part of the national team, as well as the universalization of player training. At this stage of basketball development, there is a tendency to increase the age of female athletes who are members of national teams, which provides an effective rotation over several Olympic cycles