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 [Internet]. 30 September 2025 [dikutip 12 Januari 2026];5(2):26-35. Tersedia pada: https://jurnal.pkr.ac.id/index.php/JONAH/article/view/1317