ADOLESCENTS INVOLVED IN FOOTBALL HEART PUMPING FUNCTION REACTIONSIN FUNCTIONAL LOADS
Age-related physiology has the aim to reveal the laws and peculiarities of a growing organism development. It is connected with the fact that in modern conditions a child’s organism is influenced by different factors, among which we can underline a low level of vitally important social-economic conditions, relatively low level of physical activity in terms of increasing intellectual loads, psycho-physiological influences increase, unfavorable ecological life conditions. That is why it is necessary to search for the ways of a positive influence on a child’s organism, one of which is a systematic going in for physical exercises and sport. Material. The article is about the peculiarities of the pumping heart function reaction of young football players (14-16 year-old) depending on functional loads. Research methods: scientific literature analysis and summarizing, orthostatic test, differentialrheogram according to W.G. Kubicek et al. (1970) [8] in modification of Y.T. Pushkar with the co-authorship (1977) [7] and Y.S. Vanyushin with the co-authorship (1997) [4]. Results. The greatest changes of SBV and MBV indices among young football players at the age of 14, 15 and 16 happen during the transfer from the lying position into sitting position and heart rate changes happen during the transfer from the sitting position into standing position.Consequently, the revealed physiological regularities are significant in case of reaction determination of cardiovascular system among young sportsmen and can be recommended as the tests for predominance of chronotropic or inotropic components determination in the activity of a heart in case of orthostatic test. The load of the increasing power led to the indices change of a pumping heart function among young football players, which changed depending on age-related peculiarities of the tested people. Conclusion. The used load of the increasing power can be recommended as a test for functional abilities of heart revelation among young football players, which can prove the predominant influence of chronotropic or inotropic reaction in case of cardiac output formation, which is the main hemodynamic index and which characterizes transport of oxygen from the lungs to the functioning organs and tissues.