%0 Journal Article %T DIFFERENTIATED APPROACH TO THE DEVELOPMENT OF HIGH-SPEED QUALITIES OFFOOTBALL PLAYERS AGED 14-15 %A Sirakovskaya, Y.V. %A Kuznetsov, B.V. %A SHukin, S.N. %K football players aged 14-15, speed abilities, playing roles in football, speed training, competitive activity %J Scientific notes of P. F. Lesgaft University %D 2023 %N 0 %P 7 %I National State University of Physical Education, Sports and Health named after P.F. Lesgaft