“EFFECTS OF PLYOMETRIC TRAINING IN SAND OR RIGID SURFACE ON PHYSICAL-PERFORMANCE RESPONSES AND TESTOSTERONE CONCENTRATION IN FOOTBALL PLAYERS” (2024) Proximus Journal of Sports Science and Physical Education, 1(3), pp. 16–29. Available at: https://proximusjournal.com/index.php/PJSSPE/article/view/34 (Accessed: 19 November 2024).