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