Isnanto, Juni. “Comparison of Hand Muscle Strength, Arm Muscle Strength, Back Muscle Strength, Abdominal Muscle Strength, and Flexibility Among Calisthenics Communities in Yogyakarta”. Edumaspul: Jurnal Pendidikan 9, no. 2 (October 1, 2025): 1692-1702. Accessed March 10, 2026. https://jurnal.unimen.cloud/maspuljr/article/view/9252.