PECULIARITIES OF VASOR-REGULATING FUNCTIONS OF THE VASCULAR ENDOTHELIUM IN ADAPTATION OF THE YOUTH BODY TO SYSTEMATIC PHYSICAL LOADS

Abstract

The aim: To analyze the features of changes in the functional state of the vascular endothelium of handball players in the dynamics of the training process, at different levels of the body’s hypoxic state. Materials and methods: Theoretical methods, the method of Corretti et al. with the use of high-resolution ultrasound, Fisher test with the calculation of the Fisher criterion and the Bland-Altman method. The study of the vasomotor function of the vascular endothelium was carried out of young men 18-20 y.o., who did not go in for sports and which were systematically played handball. The brachial artery diameter, maximum linear blood flow velocity, volumetric blood flow velocity were registered in the state of relative rest after artificially created reactive hyperemia. Results: The primary results obtained showed that in the process of long-term adaptation to systematic muscular work, a pronounced vasodilation effect was observed. Subsequent analyze of changes in the functional state of the vascular endothelium of young sportsmen during the macrocycle preparation different levels of the body’s hypoxic state manifested the following. The young men-athletes had more pronounced vasodilation effect, the values of the linear and volumetric blood flow velocity both in the state of relative rest and at the peak of the artificially created hyperemia were significantly higher than in the young men, who did not go in for sports. Conclusions: Suggested that the systematic muscular work contributes to a significant intensification of the oxidation pathway of nitric oxide formation from L-arginine with the participation of endothelial NO-synthase.