“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, vol. 17, no. 2, pp. 1617–1627, Aug. 2025, doi: 10.26858/cjpko.v17i2.238.