No. 11, pp. 49–51

Received: 03.08.2026 | Published: 23.10.2026

CC BY 4.0

Abstract

Objective of the study is to study the functional state of the cardiovascular system of young athletes in the process of regular physical loads. Methods and structure of the study. For the realisation of the set aims, the well-known and tested method of R.M. Baevsky was chosen, supported by the possibility of the automated collection and processing of data with the help of the specialised hardware-and-software complex ‘Poly-Spektr-12’. The empirical observations were organised as follows: annual twofold measurements of the indicators of heart rate variability (HRV) were conducted in September-October and April-May on a sample of 28 subjects. Results and conclusions. The analysis of the collected materials made it possible to reveal a clear picture of the adaptation changes of the cardiovascular system. A positive correlation was established between the duration of the training and the character of the vegetative regulation of the heart rhythm. In particular, a tendency towards the increase of sympathetic activation and the corresponding growth of the tension of the regulatory mechanisms, accompanying the progression of the adaptation processes, was discovered. Systematic training led to the formation of a fundamentally new regime of the regulation of the heart rhythm, depending on the central divisions of the nervous and hormonal systems. A firm dependence was established between individual components of heart rate variability (HRV) and the level of activity of the sympathetic division of the autonomic nervous system.

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