TY JOUR TI MODEL OF SPEED AND STRENGTH TRAINING OF YOUNG BASKETBALL PLAYERS AGED 14-15 YEARS WITH THE USE OF EXERCISES IN PAIRS WITH ADDITIONAL WEIGHTS KW model of speed and strength training (ssp) KW young basketball players 14-15 years old KW exercises in pairs with additional weights (updo) JO Scientific notes of P. F. Lesgaft University AU Gutovskiy, R.V. AU Bolotin, A.E. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft