FUNCTIONAL STATUS OF THE CHILDREN WITH REGULAR PHYSICAL ACTIVITY
Aim. The article deals with studying the dynamics of a functional status in young football players aged 10-11 based on the typological features of vegetative heart rhythm regulation and individual reactivity to physical load. Materials and Methods. 28 boys regularly attending a football section participated in the study. We studied the dynamics of their functional status by using the mathematical analysis of heart rate data. HRV data were processed and interpreted with the help of the ‘Varicard 2.51' equipment and ‘Eskim-6' program (Axion). The study was conducted at the beginning and at the end of the training year. All participants belonged to the 2nd year group of initial preparation. Results. We revealed three of four existing types of vegetative heart rhythm regulation. More than half of children are characterized by a moderate or pronounced predominance of the central regulatory mechanism. It is shown that after a four-month training in the football section, the number of children with a moderate predominance of the autonomous regulatory mechanism is increasing. We registered a significant increase in the parameters reflecting the activity of the parasympathetic nervous system. For example, RMSSD increases by 71% (р < 0.05), HF by 116% (р < 0.05). The decrease of tension in regulatory systems is proved by an increase in the total power (TP) by 35 % and a decrease in the Stress Index (SI) by 62 % (р < 0.05). We also registered a simultaneous decrease in the number of football players with the predominance of the central regulatory mechanism. Conclusion. We revealed increased resistivity to physical load in young football players with the predominance of autonomous regulation. We demonstrated the need for an individual approach to adjusting physical load concerning the genetic predisposition of heart regulation.