Siregar R, Gultom R, Saragih FL. The Effect of Exercise Consultation Program On Physical Activity Level in Elderly People at Darussalam Community Health Center, North Sumatra. jdk [Internet]. 2023 Mar. 16 [cited 2026 Oct. 3];8(3):417-24. Available from: https://jdk.ulm.ac.id/index.php/jdk/article/view/339