TY JOUR TI Application of the methodology for the development of strength qualities in younger schoolchildren aged 9-10 years KW physical qualities KW strength KW physical education and health lessons KW physical fitness KW children KW schoolchildren JO Scientific notes of P. F. Lesgaft University AU Osipenko, E.V. AU Zhang, S.. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft