Peculiarities of heart rate variability in response to orthostatic test in young sportsmen specializing in judo and unarmed self-defence

To register features of adaption mechanisms by systematical observations of the functional state of an organism of young athletes is a key element of developing a rational training process. The analysis of scientific literature allows to conclude that it is reasonable to carry out functional tests, in particular, active orthostatic tests to get objective data concerning an urgent adaptation of the cardiovascular system to external influences. Research methods: heart rate variability analysis, method of spectral analysis of heart rate variability, variational pulsometry by R. M. Baevsky; orthostatic test; methods of mathematical statistics. Materials. 62 athletes (the first grade, Candidate of Master of Sports and Master of Sports) aged 17-21 years old were examined. Results. The analysis of obtained data allow to pick out two groups with different degrees of tension of the regulatory system at rest and to determine 3 variants of responses to orthostatic impact according to classification of N. I. Shlyk (2003). Conclusion. The definition of the initial vegetative status of young athletes as well as the assessment of reaction of the cardiovascular system in the process of urgent adaptation with active orthostatic test objectively identifies the degree of tension of the regulatory system at rest. It also determines the functional reserves and the rate of recovery of physiological indicators.