“The Effect of Squat Jump Exercises On Increasing Leg Muscle Power of Grade VII Students In Volleyball Games At SMP Negeri 1 Baras”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 18, no. 2 (May 13, 2026). Accessed May 15, 2026. https://competitor.idjournal.eu/index.php/competitor/article/view/723.