Festiawan R, Suharjana S, Priyambada G, Febrianta Y. High-intensity interval training dan fartlek training: Pengaruhnya terhadap tingkat VO2 Max. JK [Internet]. 2020 Apr. 30 [cited 2025 Aug. 26];8(1):9-20. Available from: https://journal.uny.ac.id/index.php/jolahraga/article/view/31076