“The Impact of Interval Training and Leg Muscle on The Endurance Capacity of Football Players”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 17, no. 2 (June 28, 2025): 1500–1513. Accessed July 18, 2025. https://competitor.idjournal.eu/index.php/competitor/article/view/136.