Medical and biological support for the training of young athletes is a separate specific part of medical science and practice. This area of medicine includes determining the health and physical development of athletes, as well as diagnosing, treating and preventing diseases and injuries associated with physical education and sports. The main goal of medical and biological support for children’s and youth sports is the harmonious development of the child within the chosen sport, taking into account his age characteristics, functionality, physical development, including puberty.Objective. The purpose of the study is to investigate the characteristics of the physical development of young athletes of various specializations.Materials and methods: 102 young teenage athletes took part in the study. The control group consisted of 28 schoolchildren who were not involved in sports professionally. The first group of the study included 35 young athletes from the «Children and Youth Sports School of Swimming». The second group of the study consisted of 47 teenagers, students of a specialized children’s and youth sports school of the Olympic reserve in field hockey. The third group of the study included 20 young athletes, students of a specialized children’s and youth sports school of Olympic reserve fencing.Results: In terms of physical development parameters, young athletes have indicators above the average values of children in the control group. The percentage of body fat in boys and girls in the control group was significantly higher than in young athletes. At the same time, the level of muscle mass of boys who do not engage in sports is lower than that of the group of athletes.Conclusions: Based on the results of the work, it was established that the physical development of young athletes has significant differences from their peers who do not play sports professionally.
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