SUMMARY
The article deals with the results of study of the formation of complex system of educational and training tasks in physical education of 13-14 years old schoolchildren. The scheme of analysis of physical qualities due to the types of their manifestation, which gave the opportunity to distinguish 16 relatively independent components, has been developed. This contributes to the concretization of training focus of physical qualities comprehensive development. The program of detailed development of physical qualities, which provides purposeful continuous influence on all types of manifestation of physical qualities by combining separate training tasks in such a way that their minimal number could provide improvement of all factors that determine the manifestation of general motor activity of schoolchildren, has been substantiated. It has been formed the methods of complex solution of educational and training tasks that provide a comprehensive development of physical qualities, is consistent with the training essence of studying exercises and finding of adequate means for the complex solution of educational and training tasks. The results of the experimental verification of effectiveness of the developed educational-training program, which showed reliably significant changes in the level of physical preparedness, somatic health and technical preparedness of teenagers, have been presented.