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The Effect of Uphill Running And Ladder Drill Training On 50 M Sprint Running Speed of Grade VII Students At SMPN 2 Palu. Compet. J. Pendidik. Kepelatihan Olahraga. 2025;17(2):1617-1627. Accessed March 19, 2026. https://competitor.idjournal.eu/index.php/competitor/article/view/238