Hasmara, Puguh Satya, et al. “Enhancing Physical Fitness through School-Based Morning Exercise: An Experimental Study Among Children Aged 10–12 Years”. Bravo’s: Journal of Physical Education and Sport Science, vol. 13, no. 4, Dec. 2025, pp. 781-93, https://doi.org/10.32682/bravos.v13i4/225.