ramadan Sabe ahmed. A study of the elderly who exercise and do not exercise in a number of physical, functional and physical variables and lower back pain. BERJ [Internet]. 2023 Sep. 1 [cited 2025 Oct. 26];19(3):602-23. Available from: https://edusj.uomosul.edu.iq/index.php/berj/article/view/37993