The peculiarities of regulation of contractile function of the heart of athletes with different orientation of physical loads. It is established that the highest values of the stroke volume have athletes with speed-power nature of the loads, in the regulation of stroke volume they have the largest share of very low-frequency oscillations, martial artists have a higher share of low-frequency fluctuations, the development of endurance quality about the same proportion of very low-frequency and lowfrequency oscillations. During the tests the active orthostasis noted a significant contribution of low frequency oscillations in all groups of athletes; the power of high-frequency oscillations in the "endurance" and "speed-power" load of about 30% due to the lower values they share very lowfrequency oscillations. In the group of the athletes (special endurance) the range of factors regulating stroke volume of the heart reflects a relatively equal influence of suprasegmental and segmental structures and a minor contribution of the parasympathetic division.