Sports activity and adaptation to quickness of movements and speed endurance

Aim. The paper aims to examine fatigue and cardiac output under adaptation to training load. Materials and methods. The features of fatigue and adaptation to speed endurance and quickness of movements were examined in fencers and laboratory animals. The quickness of movements and speed endurance of fencers of different competitive levels were recorded under exercise conditions by means of an automated system. Laboratory rats of different physical fitness levels received 5-HT2 receptor antagonist to identify changes in cardiac output. Results. The parameters of cardiac pump function are more pronounced under the conditions of adaptation to endurance training compared to speed and speed-endurance training. In case of the use of 5-HT2 receptor antagonist, cardiac output values are more pronounced in rats adapted to speed training compared to rats adapted to endurance training. Conclusion. Body adaptation to speed training contribites to the increase in cardiac output at rest compared to endurance training. In early stages of development, the effect of serotonin on cardiac output is more pronounced as soon as other regulatory mechanisms remain less active.