The effect of the experimental procedure on the cardiorespiratory system of schoolchildren involved in the volleyball section. The experiment involved 190 students aged 14-16 years with sports experience from one to three years. The study showed that practicing volleyball for one academic year (204 hours for 6 hours per week) contribute to more efficient operation of the cardiorespiratory system of 14-16-year-old athletes. This results in lower heart rate in 14 years, figures large lung capacity at 14 and 15 years of living index in 14 years. Recommended redistribution of load volumes aerobic-anaerobic nature in favor of the dominance of aerobic exercise, the increase in the total hours of physical training, insufficient targeting of motor abilities. It is recommended to carry out at each training session (35-40 minutes). The length of time for the development of aerobic capacity of the lesson is 15-20 minutes, the reaction rate of 8-10 minutes, 7-10 minutes of flexibility. The intensity of training on heart rate on average in the range of 125-155 beats per minute.