METHODOLOGY FOR DEVELOPING SPEED ENDURANCE IN SPRINTERS WITH LOWER SPORTS QUALIFICATION GRADES. Wor. Bull.of Phy. Edu. & Spo. Sci. [Internet]. 2026 Nov. 6 [cited 2026 Nov. 10];2(4):55-63. Available from: https://worldbulletin.org/index.php/2/article/view/500