Features of manifestation the energy potential of qualified athletes and sensitivity of cardiorespiratory system to hypercapnia

Abstract

Objective. To identify the types of cardiorespiratory system (CRS) responses to hypercapnic shifts in respiratory homeostasis of qualified athletes who specialized in competitive distances of different duration, and to determine their association with the character of the energy and functional potential realization under physical loads. Methods. To analyze the CRS responses to physical loads, a set of tests was used to determine the aerobic and anaerobic capabilities of the athlete's body. To evaluate the CRS responses to hypercapnia, progressive hypercapnic stimulation by the method of "recurrent respiration was used. Characteristics of the athletes' functional fitness were determined as well. Results. With an increase in the duration of the main competitive distance and the level of overall work capacity of athletes, the sensitivity of CRS to CO2-H+ stimulus was decreased. A positive relationship was established between the sensitivity characteristics of CRS to CO2-H+ stimulus with the level of CRS responses and the rate of their development under conditions of average aerobic load and the negative relationship – under conditions of load of maximal aerobic power.