“Effect of Core Stability Exercise With Physiapp on Pain and Back Extensor Muscle Endurance in Non-Specific Low Back Pain”. JURNAL KEPERAWATAN DAN FISIOTERAPI (JKF) 8, no. 1 (October 31, 2025): 79–86. Accessed January 10, 2026. https://ejournal.medistra.ac.id/index.php/JKF/article/view/2903.