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With use of method of spiroarterycardiorhythmografy 167 persons with normothensiv type of reaction to physical activity are surveyed. Was used the test with adjustable breath for studying of mechanisms of regulation. It is by results established, that at persons with normothensiv type of reaction in reply to the test is marked the tendency to moderate increase HR, acceleration depolarysation of warm ventricles, to shortening QRS and QT, to displacement ST above an isoline, and also to slight increase of absolute values ТР and LF and decrease НF.