Rahman , Taufik, Syamsuramel Syamsuramel, Herri Yusfi, and Destriani Destriani. “Intensive Interval Training on Sprint Running Speed in Junior High School Extracurricular Activities”. Altius: Jurnal Ilmu Olahraga dan Kesehatan 12, no. 1 (March 21, 2025): 210–220. Accessed April 11, 2025. https://altius.ejournal.unsri.ac.id/index.php/altius/article/view/168.