IMPROVEMENT OF THE LONG-TERM TRAINING SYSTEM OF VOLLEYBALL PLAYERS BASED ON THE PRINCIPLES OF INDIVIDUALIZATION AND VARIABILITY OF TRAINING LOADS. Wor. Bull.of Phy. Edu. & Spo. Sci. 2025;1(03):70-81. Accessed May 1, 2026. https://worldbulletin.org/index.php/2/article/view/172