The Effect Of Variations In Extensive Interval Training On Aerobic Endurance Fighter Muaythai Fightculture Medan. JCES [Internet]. 2024 May 11 [cited 2024 Sep. 3];3(2):147-56. Available from: https://ejurnal.ubharajaya.ac.id/index.php/JCESPORTS/article/view/1846