TY JOUR TI Substantiation of an innovative methodology for the development of speed and high-speed endurance of young short-distance runners KW athletics KW running on short distances KW speed endurance KW speed KW sports results KW innovative methodology JO Scientific notes of P. F. Lesgaft University AU Dababsi, D.F. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft