The state of the autonomous (vegetative) nervous system and heart rhythm disorders under exercise conditions

Ingenious methods of exercise cardiac rhythmgram math simulation are used to study the autonomic regulation of the heart rate. Changes in a number of autonomic nervous system (ANS) - an increase in activity in general, and the manifestation of parasympathetic dominance reflects improved exercise tolerance. Supraventricular extrasystole, a typical heart beat disorder which is not observed at rest and manifesting under exercise conditions, is a consequence of its excess (overload) independently of the endurance development level. Improvement of adaptive mechanisms in the formation of endurance reduces the possibility of extrasystole due to the increase of a potentially dangerous load threshold, manifestation time and decrease in the number of extrasystole complexes. In turn, heart beat disorders have fundamental differences in the vegetative base depending on the endurance development level.