Age dynamics of the active mass of the body of students 12-17 years of municipal educational institutions of Chelyabinsk

The role of active body mass of students is not as often subject to discussion in the modern physiology of physical activity and sport. However, its importance in maintaining optimal health and physical performance, especially athletic performance, it is essential. On this basis, we analyzed this issue in adolescence ontogeny of students 12-17 years of municipal educational institutions metropolis Urals.