SEASONAL CHANGES IN INDICATORS OF THE IMMUNE AND ENDOCRINE SYSTEMS OF ATHLETES IN THE NATURAL AND CLIMATIC CONDITIONS OF THE MIDDLE OB REGION

Abstract

The article presents the study results of some indicators of the immune and endocrine systems of young men and women with high physical activity during the year periods with the minimum and maximum duration of daylight. The study involved 60 sportsmen of high qualification (40 women and 20 men). The amount of physical activity of the surveyed ranged from 18 to 32 hours a week. Type of the research is observational (longitudinal). The method of sampling is non-randomized. The following parameters were studied: immunoglobulins A, M, G, free triiodothyronine and thyroxine, thyroid-stimulating hormone, cortisol, total testosterone, dehydroepiandrosterone sulfate. The study revealed that young men and women with high physical activity had a statistically significant seasonal changes in blood levels of immunoglobulin M and G, thyroid hormones, correlations between north and sports experience and investigated blood parameters. A statistically significant trend has been revealed, which indicated an increase in the functional activity of steroid hormones during the maximum duration of daylight. The obtained results testify to the optimal adaptation of the immune and endocrine systems of athletes to specific climatic and geophysical conditions of the North and intensive physical loads, which consists in changing the reactivity of the humoral link of immunity, thyroid hormone activity, adrenal cortex and gonads. The individual values of the studied indicators did not exceed the limits of physiological standards.