L.V. Cherenkova - Post-graduate Student, Department of Physiology, Kuban State University of Physical Culture, Sports and Tourism (Krasnodar). E-mail: tsarlu@mail.ru E.M. Berdichevskaya - Dr.Sc. (Med.), Professor, Head of the Department of Physiology, Kuban State University of Physical Culture, Sports and Tourism (Krasnodar). E-mail: emberd@mail.ru