Purpose: determination of somatologic characteristics of biathlon students' body constitution in predicting of their successfulness. Material: in the research the following students participated (n=27, age19-21 years, boys n=17, girls n=10). Quetelet's, Erisman's and Piniet's anthropometric indices were calculated as well as life index. Results: the greatest distinctions between boys and girls were observed by the following absolute indicators: body, trunk and torso lengths; body mass. The least distinctions were by the length of upper and lower limbs, which prevail in boys. In girls we observed noticeable realization of diaphragm breathing. It permits to increase alveolar surface at the cost of lungs' stretching in longitudinal direction. With it, there was no visible change of chest excursion. Relatively high level of women's physical fitness conditions asthenia (dolymorphia). It results in approximation of girls' chest shape to men's. In boys formation of somatic type is realized at the cost of chest circumferential sizes but directly depends on the strength of hands' and back's muscles. Conclusions: for some sport-pedagogic activities (in our case-biathlon) certain type of body constitution is intrinsic, which conditions successfulness of professional program realization. Somatic type characterizes compliance and correlation of separated body links. These criteria permit to reduce costly part of future specialist's training and achieve high results in professional activity.

Quantitative assessment of the functional support of sports activities, as a reflection of the systematic approach, allows to identify the features of the body of athletes, to plan the training process and possible deviations in the action of multiple exogenous and endogenous factors. In accordance with the methodology of artificial intelligence and machine learning, the most informative indicators were determined, which determine the success of sports activities. This made it possible to determine the peculiarities of the functioning of the cardiovascular system of elite biathletes, which provides and limits physical performance. As a result of the research, functional models of high-, medium-and low-skilled biathletes have been built that will improve the training process.

The study aims to research the influence of the gender characteristics of boys and girls on their self-esteem regarding their physical development, health status, as well as to determine the relationship between the level of self-esteem and their belonging to the psychological type of personality (masculine, feminine, androgynous) among respon- dents who engage in and do not engage in sports. The study involved students in grades 5-11 (638 subjects). To study the level of self-esteem of the physical development of schoolchildren, a test questionnaire by “Self-Description of Physical Development”, a test questionnaire by “Masculinity-Femininity”, cluster analysis, and methods of mathemat- ical statistics were used. It was determined that the self-esteem of the physical development of schoolchildren, for the most part, has a high and overstated level, which is 80-85% of the maximum score. The structure of age groups of boys and girls was determined according to the manifestation of psychological gender signs using cluster anal- ysis. Based on the data obtained, it can be stated that boys and girls have certain common gender characteristics. However, there are distinctive features are more numerous. The data obtained are the basis for the systematization of data on the gender approach in physical education, the definition of limiting and stimulating factors affecting the formation of the individual physical culture of people with various signs of psychological gender.