Objective. To consider the issues dealing with realization of athletes’ functional capacities in the process of sports training.
Methods. Theoretical analysis and generalization, systematization, scientific literature analysis.
Results. Estimation of functional capacity realization in four directions. They are characterized by specific for competitive load type kinetics of the body main systems and optimization character of individual physiological reactivity.
Conclusion. Generalization of knowledge and their consideration relative to sports training practice is of great importance for determining human reserve capacities during strenuous muscular loads