Amelia, R., Erliana, M., Mulhim, M., & Haffyandi, R. A. (2026). Effects of Stability Ball Training on Flexibility in Adolescents: A School-Based Intervention Study. Jurnal Master Penjas & Olahraga, 7(1), 989–998. https://doi.org/10.37742/jmpo.v7i1.216