APPLICATION OF PROGRESSIVE MUSCLE RELAXATION TECHNIQUES IN THE ELDERLY TO REDUCE HYPERTENSION IN THE WORKING AREA OF THE PEKAN HERAN PUBLIC HEALTH CENTER. JURNAL KEPERAWATAN. 2025;5(2):26-35. Diakses Januari 12, 2026. https://jurnal.pkr.ac.id/index.php/JONAH/article/view/1317