“THE EFFECT OF ABDOMINAL STRETCHING EXERCISES ON DHYSMENORREA DECREASE OF ADOLESCENT IN ENVIRONMENT DUSUN III, HELVETIA SUB- DISTRICT, SUNGGAL, MEDAN” (2026) Journal of Health Management, Administration and Public Health Policies, 4(1), pp. 8–17. doi:10.52060/healthmaps.v4i1.4527.