Akbari, Rian, et al. , translators. “In Junior High School Boys, a Comparison Of Hollow Sprint and Acceleration Sprint Methods on the Sprinter 100 Meters”. INSPIREE: Indonesian Sport Innovation Review, vol. 3, no. 01, Jan. 2022, pp. 47-55, https://doi.org/10.53905/inspiree.v3i01.72.