“The Effectiveness of Plyometric Training on Agility and Speed of U-15 Badminton Athletes” (2025) COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, 17(2), pp. 893–904. Available at: https://competitor.idjournal.eu/index.php/competitor/article/view/58 (Accessed: 19 March 2026).