Ningsi, Yeni Septia, and Nova Elok Mardliyana. “The Effect of Endorphin Massage on Back Pain Intensity in Pregnant and Laboring Women: A Literature Review”. Journal of Sports Nursing, Medical, And Health 1, no. 01 (July 29, 2025): 16–24. Accessed May 24, 2026. https://journal.pubsains.com/index.php/sportnursmedhealth/article/view/286.