Maskurido, Dicky, Sukendro Sukendro, and Sugih Suhartini. “The Effect Of Mud Jump Exercise Variations On The Leg Muscle Power Of Beginner Players Of The Rottan Volleyball Club, Kuala Betara District”. Sport Science 26, no. 1 (January 17, 2026): 1-5. Accessed March 5, 2026. http://sportscience.ppj.unp.ac.id/index.php/jss/article/view/277.