Heart rate variability in untrained young men under different power loading modes

Abstract

To study features of variability of a rhythm of heart at unexercised young men under the influence of power loadings in the conditions of appication of certain training modes in the course of long occupations by athleticism. 40 young men participated in ispections at the age of 19-20 years, not having contraindications for occupations with burdenings. Research of indicators training loading of both groups used by representatives in the course of occupations conducted a method of definition of an index of training loading in athleticism. For determination of values of indicators of the statistical and spectral analysis of a rhythm of Polar RS800CX cardiomonitor was used. Control of studied indicators at rest and after power loading carried out for 3months of occupations by athleticism with an interval in 1 month. Use in the course of occupations by athleticism of power loadings with large volume of work and low intensity considerably increases activity of the central mechanisms of neurohumoral regulation of a rhythm of heart due to decrease in panasympathetic activation of autonomous nervous system on sinusovy knot of heart, than loading of high intensity with a small volume of work. The result of long-term adaptation to occupations by athleticism, in the conditions of different modes of loading, is characterized by existence of an ekonomization of functioning of cardiovascular system of the unexercised contingent.