The study was designed to profile the sport-specific autonomic regulation of heart rate in different sport disciplines as the autonomic function profiling tests are still underestimated as indicators of chronic overstress, overtraining and health conditions. Individual specifics of the autonomic regulation are known to directly determine the specific adaptability to the training process, with the autonomic balance shift (eytonya) towards sympathetic effects commonly considered a warning sign. The sympathetic nervous system activation is associated with a growth of the stroke/ minute volumes. Since the autonomic blood circulation index includes an blood pressure function indirectly indicative of the stroke volume variation and heart rate, it may be used as an informative marker of the athlete`s health condition on a sport-specific basis - since the modern sport disciplines are demanding to different psychophysical qualities and abilities that shape up, in their turn, the autonomic regulation of the cardiac function. Sampled for the study purposes were the 17-19 year-old athletes (n=193 including 93 males and 40 females). The autonomic regulation of the cardiovascular system was rated by measuring the dominant tonus in one of the autonomic nervous system departments.
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