Abstract

The main structural-functional indices of cardiac performance during isometric exercise were recorded in athletes and non-athletes. The physiological shifts in response to exercise were less obvious in the athletes than in the non-athletes. This was mainly determined by the structural features of the “athlete’s heart.” The dependence of a series of physiological indices on the heart rate was revealed: as cardiac rhythm increased in response to a submaximal isometric exercise, the systolic and, to a lesser degree, diastolic arterial pressure grew and the stroke volume of blood decreased.

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