Differences vegetative regulation of heart ratein young people, male and female, living in conditions of Priobye

Purpose.To identify differences in heart rate variability parameters in young people of both sexes in teach- ing in difficult climatic conditions.Material and methods. 35 boys and 61 girls students of first and second courses of medical faculty of the Khanty-Mansiysk State Medical Academy were examined.We studied heart rate variability using pulse oximeter «ELOX-01». We have identified the parameters of statistical and spectral analysis and calculated the secondary parameters of heart rate variability.Results. Average characteristics SDNN in students of male and female conform to the values characteris- tic of parasympathetic tone. In the group of young men, we observed spectral displacement of HRV in the direction of low-frequency waves, a higher activity of sympathetic effects in the regulation of heart rate indicator according to LF. The activity of the sympathetic division of the ANS dominated in 85,7 % of boys and 60,6 % girls. Indicators in the girls group showed lower values ratio LF/HF. The percentage contribution of low-frequency oscillations in the total spectrum power was significantly lower in girls than in boys. The percentage contribution to total power spectrum of high-frequency oscillations of in girls was higher than boys.Conclusion. There were identified sex differences in the northern medical school of the autonomic regula- tion of the heart rhythm in students in our study. In the group of young men, we found a higher activity of sympathetic effects in the regulation of heart rate, spectral displacement of HRV in the direction of low- frequency waves. In the group of girls was found a greater contribution of parasympathetic influences in the regulation of heart rate, higher activity of autonomous regulation contour. The central components of the regulation of cardiac activity predominated in boys.