Widiandaru, Alfiandre, et al. “Efforts to Improve Long Jump Performance Using a Modified Hula Hoop for 11th-Grade Students at SMK Negeri 2 Semarang”. Jurnal Moderasi Olahraga, vol. 6, no. 1, June 2026, pp. 142-53, doi:10.53863/mor.v6i1.2273.