TY JOUR TI NORMAL TRAINING TO DEVELOP EXPLOSIVE STRENGTH AND SPEED ENDURANCE IN PREPARATION FOR THE WINTER COMPETITIVE SEASON OF SPRINTERS-ATHLETES KW accumulative training method KW cumulative training method KW cumulative effect KW heart rate KW muscle tension JO Scientific notes of P. F. Lesgaft University AU Lobachev, V.S. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft