“The Differential Effects of Circuit Training and High-Intensity Interval Training (HIIT) Methods on VO₂Max Improvement in Pencak Silat Athletes at SMA Negeri 2 Taruna Pamong Praja, East Java”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 17, no. 2 (June 30, 2025): 1039–1047. Accessed July 18, 2025. https://competitor.idjournal.eu/index.php/competitor/article/view/65.