FEATURES OF ELECTROCARDIOGRAPHIC INDICATORS AND DATA OF HEART RATE VARIABILITY IN YOUNG FOOTBALLERS

The great importance has recently been attached to studying the functional capabilities of athletes taking into account the data of bioelectric activity of the myocardium, as well as vegetative status based on the analysis of heart rate variability. However, works in which questions regarding the age-related features of the ECG and the autonomic provision of the heart rate for young football players are not enough. In order to clarify the effect of age on ECG and heart rate variability (HRV), a comparative analysis of 5-minute records and standard ECG in 12 leads was conducted for young players aged 13-15 years (n = 39) and 16-17 years (n = 23). The mathematical and spectral methods for analyzing HRV with the calculation of the stress index R. M. Baevsky were used to assess the state of the mechanisms of neurohumoral regulation of the heart, the activity of segmental and suprasegmental parts of the autonomic nervous system (ANS). The comparative study of five‐minute ECG recordings of standard 12-lead electrocardiograms of young football players aged 13-15 (n = 39) and 16-17 years (n = 23) was carried out to clarify the effect of age on the electrocardiogram and heart rate variability. The frequency of registration of incomplete LBBB decreases by 2.2 times with an increase in the age of football players and there is a tendency to increase the tone of the parasympathetic link of the ANS.