[Age-related peculiarities of regulating heart rhythm in dose-adjusted physical stress].

Abstract

The authors examined the heart rate regulation by means of rhythmography during and after dynamic exercise in 90 normal subjects aged between 20 and 89 years and in 15 older man who went in for endurance training. It was shown that the quality of the regulation of the cardiac rhythm deteriorates in the course of aging. This is associated with the impairment of the vegetative influences on the sino-atrial node on aging. Physical endurance training contributes to the regulation of the cardiac rhythm in persons at older age.