Peculiarities of the regulation of indices of hemodynamics and heart rhythm in young people of the city of Magadan under submaximal physical load

The cardiovascular system is known to be one of the basic physiological systems responsible for the adaptation to the north conditions. To determine its compensatory adjustments as well as to explore the entire body functional state, physical exercises have become to be widely accepted since they enable modeling different kinds of human activities. Among such controlled exercises is bicycle ergometry which provides registering the smallest change in needs of the body organs and systems. The physical capacity of 54 male students, residents of Russia’s northeast was assessed on the base of the modified standard of the PWC₁₇₀ test. Several cardiovascular, hemodynamic and heart rate indices were recorded before and after the test. Results of the study testify significant adaptation shifts in the cardiovascular system to occur due to the dynamic physical work. Besides, the young male residents of Magadan experienced submaximal physical exercises demonstrate the exhaustion in the body functional reserves. That can be seen in the body hypertonic type of the response to the exercise, in the inability of the pulse response to reach a steady state, in overactive both adrenergic mechanisms and higher suprasegmental structures as well as in inhibition of the autonomic regulation. Accounting for the decreased values of maximal oxygen consumption the examined subjects can be considered as having the low tolerance to the given type of the physical exercise.