UMARJONOVICH, X. N. ANALYSIS OF THE LEVEL OF SPEED-STRENGTH TRAINING IN 13–15- YEAR-OLD FOOTBALL PLAYERS. Research Focus International Scientific Journal, [S. l.], v. 5, n. 3, p. 126–129, 2026. Disponível em: https://refocus.uz/index.php/rf/article/view/2356. Acesso em: 16 jun. 2026.