NUGRAHA, A. D.; YUDANTO, Y.; BAHRI, S. The impact of using surgical masks and non-masks when exercising on heart rate, calories and VO2max during the Covid-19 pandemic. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran, [S. l.], v. 7, n. 1, p. 84–92, 2021. DOI: 10.29407/js_unpgri.v7i1.15698. Disponível em: https://ojs.unpkediri.ac.id/index.php/pjk/article/view/15698. Acesso em: 23 dec. 2024.