Hasanah, F., Hidayatullah, F., Handayani, H. Y., & Putri Purwoto, S. (2022). Implementation of the ruler drop test online to measure the reaction speed. Jurnal Maenpo : Jurnal Pendidikan Jasmani Kesehatan Dan Rekreasi, 12(2), 165–177. https://doi.org/10.35194/jm.v12i2.2399