Chzhu Khuasin, Nyu Yindon, & Vrublevskiy E.P. (2024). The evolution of performance indicators in high-intensity and high-speed training for boys aged 10 to 13, with varying levels of physical activity. Theory and Practice of Physical Culture, (10), 23–25. Retrieved from http://tpfk.ru/index.php/TPPC/article/view/1136