DIFFERENT FEATURES OF CHANGES IN CENTRAL HEMODYNAMICS DURING EARLY RECOVERY AFTER DIFFERENT EXERCISE REGIMES
O.M. Bakunovsky1,2, H.V. Lukyantseva2, S.S. Malyuga2, L.T. Kotlyarenko3
- Bogomoletz Institute of Physioligy National Academy of Sciences of Ukraine, Kyiv, Ukraine
- National University of Physical Education and Sport of Ukraine, Kyiv, Ukraine
- Cherniakhovskyi National Defence University of Ukraine, Kyiv, Ukraine
DOI: https://doi.org/10.15407/fz67.06.013
Abstract
We studied the changes in central hemodynamics in the early
recovery period after physical load in 28 young men. Dynamic
loading was induced using a modified Martine functional test,
static loading - by maintaining on the standing dynamometer
DS-200 muscle effort in the amount of 50% of maximum
standing force. The change in central hemodynamic para-
meters was recorded by tetrapolar thoracic impedance rheo-
plethysmogram using a computerized diagnostic complex
«Cardio +». Dynamic exercise during early recovery did not
lead to a significant increase in heart rate, however, it caused
a decrease in the resistance of resistive blood vessels and an
increase in pulse blood pressure. The increase in minute blood
volume in our study is mainly due to an increase in stroke
volume, pointing for high functional reserves of the heart. In
the case of static physical activity, the adaptive reactions of
central hemodynamics and the course of the processes of early
recovery of the circulatory system are radically different from
similar indicators during dynamic physical activity. In subjects
with a normodynamic type of response of the cardiovascular
system to dynamic load, no significant changes in the minute
volume of blood flow were registered at a similar volume of
active muscle mass static load. In subjects with a normodynamic
type of cardiovascular response to dynamic load, no significant
changes in cardiac output were observed at a similar static
load in terms of active muscle mass. However, during early
recovery period, the total peripheral vascular resistance and
systolic arterial pressure were increased. The increase in total
peripheral resistance may be due to reactive hyperemia in
ischemic skeletal muscle caused by increased blood flow to
the capillaries after muscle relaxation and delayed outflow into
the veins. The significant increase in systolic blood pressure
can be explained by the mechanical obstruction of blood flow
in the muscle capillaries during prolonged static contraction.
Keywords:
dynamic loading; static loading; cardiovascular system; early recovery.
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