Nugraha, A. R., and K. N. Berawi. “Pengaruh High Intensity Interval Training (HIIT) Terhadap Kebugaran Kardiorespirasi”. Majority, vol. 6, no. 1, Feb. 2017, pp. 1-5, https://juke.kedokteran.unila.ac.id/index.php/majority/article/view/1521.