Chzhu Khuasin, Nyu Yindon, Vrublevskiy E.P. The evolution of performance indicators in high-intensity and high-speed training for boys aged 10 to 13, with varying levels of physical activity. TPPC [Internet]. 2024 Dec. 25 [cited 2024 Dec. 28];(10):23-5. Available from: http://tpfk.ru/index.php/TPPC/article/view/1136