TY JOUR TI EFFECT OF CIRCUIT TRAINING ON THE DEVELOPMENT OF RUNNERS' SPEED ABILITIES DURING ATHLETICS CLASSES AT UNIVERSITY KW circuit training KW athletes KW speed abilities KW set of exercises JO Scientific notes of P. F. Lesgaft University AU Tagirova, N.D. AU Morozova, O.V. AU Konopleva, E.G. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft