TY JOUR TI Assessment of the functional fitness of ski racers based on relative values of maximum oxygen consumption KW cross-country skiing KW functional preparedness KW aerobic energy supply factors KW maximum oxygen consumption KW model values KW forecasting JO Scientific notes of P. F. Lesgaft University AU Ardashev, A.E. AU Popova, A.I. AU Chuchkov, V.M. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft