TY JOUR TI FEMALE ATHLETES' SPECIALIZING IN ULTRA-LONG TRACK-AND-FIELD DISTANCES ENERGY PROFILE OFFUNCTIONAL FITNESS PECULIARITIES KW ultra-long distances KW running 24 hours KW walking 50 km KW athletes KW functional fitness KW energy profile KW training loads JO Scientific notes of P. F. Lesgaft University AU Ovsyannikova, A.V. AU Makarova, N.V. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft