M. V. Shayhelislamova - Dr.Sc. (Biol.), Professor, Department of Anatomy, Physiology and Human Health, Kazan Federal University (Volga region). E-mail: bettydn@mail.ru N. B. Dikopolskaya - Ph.D. (Biol.), Associate Professor, Department of Anatomy, Physiology and Human Health, Kazan Federal University (Volga region). E-mail: bettydn@mail.ru G. G. Kayumova - Post-graduate Student, Department of anatomy, physiology and human health, Kazan Federal University (Volga region). E-mail: guzelka1003@yandex.ru

The study of the functional state of the adrenal cortex in young athletes 11-15 years old and their comparative characteristics of boys control class revealed that daily urinary free cortisol metabolites and hormones depends on the level of motor activity, age and sexual maturity of teenagers. Shown that urinary free cortisol in athletes 11-14 years is characterized by consistently high levels, and by 15 years it is observed a significant reduction. Unlike boys, not involved in sports in which cortisol in urine significantly lower (p < 0.05), and from 13 to 15 years is noted for its progressive increase (p < 0.05). The result of a specific effect of increased physical activity on the child-s body is a relative slowing of puberty boys athletes, which is understandable from the point of view of the inhibitory effect of high concentrations of glucocorticoids on the processes of sexual differentiation and function of the gonads. However, the transformation of puberty adrenal cortex in children of sport class completed earlier than in the control, they reflect not only the hormonal changes of puberty, but adaptive responses aimed at increasing the resilience of children to the effects of increased physical activity.

 

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