SUMMARY
The purpose of the study: the scientific substantiation of bioenergy on the functional state, functional performance in predicting the athletic performance of Russian skiers in a mass start at fifty kilometers at the Olympic Games in Pyeongchang. Material and research methods: analysis of scientific and methodological literature, ascertaining experiment, analysis and generalization of information, method of mathematical statistics. The method of mathematical processing of the results of the experiment provided for the calculation of the reliability of the Student t-test, where the differences between the comparative results of the pedagogical experiment were determined. Statistical processing of the results of skiers was carried out according to the method between sample average indicators at a 5% significance level (P <0.05), which is recognized as a completely reliable criterion for research. The study used the method of quantum estimation of the energy and functional state of skiers of the national team of Russia at the Olympic Games in Pyeongchang. The quantum method is a contact or remote impact on the energy system of skiers, used for diagnostics, assessing the restoration of a functional state during and after a game of educational, training and competitive activity. The results of the study showed that skiers in Russia at a mass start at fifty kilometers have a bioenergy level - medium and high - in the work of bioenergy centers of the energy system of the spinal canal, neuromuscular, autonomic and central nervous system. The skiers of Russia in a mass start at fifty kilometers at the Olympic Games in Pyeongchang revealed a different color energy system consisting of purple, green, yellow, light red, dark red, red colors, which are interconnected and with the prediction of sports results at a distance fifty kilometers at the Pyeongchang Olympics. This confirms the optimal level of bioenergetic and functional state of Russian skiers individually in a mass start at fifty kilometers.