Preparation of skiers-racers in the competitive period with the use of analysis of variability of heart rhythm

This article focuses on studying the impact of physical activity on the values of heart rate variability. The article gives some recommendations based on the research, so if in the morning the index of total power (TP) was significantly lower than an average one for a particular sportsman, and tension index (TI) was 2-4 times higher, then this sportsman was recommended to get some recreation or rehabilitation at the pulse of 130-140 beats / min. If in the morning the index of TP and TI are within the average figures typical for the sportsman, and the coefficient of vagosympathetic balance LF / HF is less than 1, then the sportsman can perform all trainings which are big both in volume and intensity.