Donie, Donie, et al. “The Effectiveness of Footwork Exercises With the HIIT Method in Developing VO2max and Anaerobic Capacity”. AL-ISHLAH: Jurnal Pendidikan, vol. 13, no. 2, Aug. 2021, pp. 998-1005, doi:10.35445/alishlah.v13i2.803.