The integrated studies of central hemodynamics and vascular load of the heart in athletes of various specializations and skill levels are carried out over the last 30 years at RSUPE. However, data on the central hemodynamics and vascular load of the heart in highly skilled archers in the conditions of the draw are virtually absent. Determination of the vascular resistances (peripheral and elastic) during the draw is difficult because of the need of blood pressure measuring [4], it is virtually impossible since a typical way to draw both arms stiff. To simulate the draw, the authors have used the expander, one end of which is rigidly fixed, and stretching expander at the other end with one hand simulates the draw thus the second hand is free to measure blood pressure. It is shown that in the course of research the vascular resistances change in wide limits - from optimal normal levels to prehypertonic and hypertonic levels of their values. Thus, the systolic and diastolic pressures remain normal before stretching expander, and during the tensioning and recovery. With the increase in vascular resistance the values of the stroke and minute blood volumes are significantly reduced.

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Инструментальные методы исследования в кардиологии (Руководство) / Ред. Г. И. Сидоренко.-Минск, 1994.-272 с. Instrumental'nye metody issledovaniya v kardiologii (Rukovodstvo) / Red. G. I. Sidorenko.-Minsk, 1994.-272 p. (in Russian).

The effects of adaptation of cardiovascular system during muscular work and after completion are characterized by a certain agreed set of indicators of central hemodynamics, vascular workload of the heart and its contractility. The coordinated changing of hemodynamics and interactions indices of heart and vessels are determined by a functional subject´s state and also by capacity of the work performed by the relevant muscle groups. It is shown that when performing certain exercises of gymnastics Pilates, the values of vascular resistance (under normal systolic and diastolic blood pressure) can reach values of hypertensive level (over 2000 din-c/cm5 for peripheral vascular resistance - R and over 2000 din/cm5 for elastic vascular resistance - Ea). Such values of vascular resistance, as vascular load of the heart, are obtained during a transitional process with proper voltage group of postural muscles that provide the ability to perform certain exercises Pilates. In contrast to dynamic physical exercises, for example cycling, exercises Pilates are performed in quasi-static mode. In both cases, there is the growth of elastic vascular resistance, but in dynamic mode there is a fairly dramatic decrease in peripheral resistance, and in the quasi-static regime - an increasing EA simultaneously with the increase in peripheral resistance R.