Maskurido D, Sukendro S, Suhartini S. The Effect Of Mud Jump Exercise Variations On The Leg Muscle Power Of Beginner Players Of The Rottan Volleyball Club, Kuala Betara District. jss [Internet]. 17Jan.2026 [cited 5Mar.2026];26(1):1-. Available from: http://sportscience.ppj.unp.ac.id/index.php/jss/article/view/277