“The Influence of Arm Muscle Strength And Hand-Eye Coordination on Volleyball Underhand Passing Ability As Viewed From The Motivation of Students At SMA Negeri 21 Makassar”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 17, no. 2 (July 15, 2025): 831–847. Accessed July 18, 2025. https://competitor.idjournal.eu/index.php/competitor/article/view/71.