DIURNAL AND SEASONAL RHYTHMS OF CORTISOL CONTENT IN THE MEN OF THE HIGH AND MIDDLE LATITUDES

The aim of this study is investigation of the features of diurnal and seasonal rhythms of blood plasma cortisol in representatives of the male population of the North (Norilsk) and middle latitudes (Novosibirsk). It was shown that the daily rhythms of cortisol in men of different latitudes had certain peculiarities depending on the season, but they were also characterized by similar signs: high values in the morning hours (from 3 to 11 hours), followed by a decrease during the day. Seasonal rhythms of cortisol in men in these regions differed significantly. Seasonal fluctuations of cortisol in residents of the middle latitudes were characterized by an increase in the content of cortisol in the spring-summer period and a marked decrease in the autumn-winter period. Seasonal differences in the daily rhythm of cortisol content in northerners were not found

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Polyakov L.M. – doctor of medical sciences, professor, head of the laboratory of medical biotechnology, e-mail: plm@niibch.ru