Syaputra, Irfan, and Hendri Neldi. “The Effect Of Arm Power, Eye Coordination Through Waist Muscle Flexibility On The Ability To Swim In 50 M Breaststroke For Junior Swimming Athletes”. STAMINA 7, no. 4 (December 30, 2024): 210-217. Accessed February 23, 2025. http://stamina.ppj.unp.ac.id/index.php/JST/article/view/1284.