Fandy Fauzan, Imanuddin Siregar, and Muhammad Badrun Siregar. “Efforts To Improve Learning Outcomes Of 50 Metres Short Distance Running (Sprint) Through Modification Of Playing In Grade V Students Of Tunas Harapan Elementary School”. Journal Physical Health Recreation (JPHR), Vol. 5, no. 2, May 2025, pp. 302-1, doi:10.55081/jphr.v5i2.3840.