Sari, Felinda, et al. “The Effect of Plyometric Box Jump and Hurdle Hopping Exercises on Limb Muscle Explosive Power in a High School Volleyball Team”. JOURNAL RESPECS (Research Physical Education and Sports), vol. 5, no. 2, July 2023, pp. 411-7, doi:10.31949/respecs.v5i2.5982.