“Influence of Outdoor Physical Activity on Vitamin D Levels and Bone Health in School-Age Children” (2023) International Journal of Sports, Yoga, and Physical Activity, ISSN: 3005-5083, 2(2), pp. 1–8. Available at: https://internationalsportsjournal.com/index.php/sportsjournal/article/view/16 (Accessed: 23 September 2025).