Bioelectric activity of heart of athletes in the conditions of the priobsky north

About the authors:

Irina A. Pogonysheva, Cand. Sci. (Biol.), Associate Professor, Department of Ecology, Nizhnevartovsk State University
Denis A. Pogonyshev, Can. Sci. (Biol.), Associate Professor, Department of Ecology, Nizhnevartovsk State University
Vladimir S. Solovyov, Dr. Sci. (Med.), Professor, Head of the Department of Anatomy and Physiology of Humans and Animals, Institute of Biology, Tyumen State University; adapt78@yandex.ru

Abstract:

The article describes the study of bioelectrical activity of the heart among students engaged in sports in the climatic conditions of Khanty-Mansiysk Autonomous District — Yugra. An in-depth automated analysis of electrocardiograms revealed regular changes in cardiac electrical activity, which is proved to be influenced by systematic physical training. Sinus rhythm was demonstrated in all subjects. Physiological changes in circulatory system among sportspeople were less evident compared to their less trained peers. ECG of 60 % of subjects demonstrated sinus bradycardia, a most frequently observed change. Dysfunction of affectivity and automaticity (extrasystolic arrhythmia) was observed in 5% of students from the Faculty of Physical Education and Sports.Compared to regular students, students who practice sports have higher final ventricular deflections which fall within physiological range. The changes in bioelectrical activity parameters of heart among students engaged in sports in the Northern climatic conditions prove that blood circulatory system is influenced by systematic sports training. The changes are also defined by economization of chronotopic function, high cardiac functional capacity and increased vagal tone.

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