Usman, Khairul, et al. “Impact of Nias Culture Based Physical Training on Students’ Cardiovascular Endurance”. Al-Rafidain Journal of Medical Sciences ( ISSN 2789-3219 ), vol. 11, no. 1, July 2026, pp. 16-22, https://ajms.iq/index.php/ALRAFIDAIN/article/view/2936.