Method of definition of overtraining and/or stress level at elite athletes on the basis of an assessment of circadian dynamics of a color spectrogram of heart rate variability
The new method of an assessment of the color spectrogram of the heart rate variability (HRV) in the period of a night dream, allows to reveal signs of an overtraining and/or a psychological stress that in turn promotes timely correction of training process, allowing to reach high sports results. 76 elite athletes (36 boys and 40 girls) members of the youthful national teams of the Russian Federation were surveyed (weightlifting, swimming, handball, synchronized swimming, a diving, hockey) 14-17 (15,5 ± 1,1) years, control group made 11 healthy teenagers of the same age who aren't playing sports. By all were perfomed 12 ch. rest ECG, stress test (PWC 170), holter monitoring - HM (Medilog DARWIN 1.11.5, Schiller) was carried out. Along with the standard parameters estimated at HM, the visual analysis of the color spectrogram of HRV which is a specific original option for this system was carried out. High-frequency waves from 0.15 to 0.40 Hz (HF - high freguence) had color range from yellow to red and reflected level of parasympathetic influences on a heart rhythm, low-frequency waves from 0.04 to 0.15 Hz (LH - low freguence) had blue color range and reflected level of sympathetic influences on a heart rhythm. At 12 % (n = 9) of athletes according to the color spectrogram of HRV dysfunction of autonomic nervous system with reduction of parasympathetic influences on a heart rhythm (decrease in high-frequency waves of a yellow-red range less than 0.15 Hz) or with a smoothness of a circadian profile of the color spectrogram of variability of a rhythm of heart in day and night time with lack of high-frequency waves of a yellow-red range was noted. That was clinically associated with decrease in sports results, fatigue, etc. When carrying out correcting actions and (or) treatment normalization of the pathological changes was noted. Conclusion: the new method a method of an assessment of the color spectrogram of the HRV in the period of a night, allows quickly and visually at preclinical level to reveal signs of an overtraining and (or) a psychological stress as at athletes, so in in other groups, in time to carry out correction of violations and to estimate their efficiency.