“Active Strecthing Back Statis : Solusi Latihan Kelenturan Punggung Atlet Voli”. Jurnal Olahraga Indragiri 9, no. 2 (October 29, 2025): 99–110. Accessed November 6, 2025. https://ejournal-fkip.unisi.ac.id/joi/article/view/2980.