TY JOUR TI IMPACT OF ANAEROBIC TRAINING MODES ON THE DEVELOPMENT OF SPEED ENDURANCE OF YOUNG SWIMMERS KW young swimmers KW anaerobic training regimen KW speed-strength qualities JO Scientific notes of P. F. Lesgaft University AU Ponimasov, O.E. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft