C-HIIT to improve the concentration and quality of sleep of schoolchildren with learning difficulties: Pilot studies. European Journal of Education and Psychology, [S. l.], v. 13, n. 1, p. 19–32, 2019. DOI: 10.30552/ejep.v13i1.289. Disponível em: https://revistas.uautonoma.cl/index.php/ejep/article/view/1078. Acesso em: 27 jun. 2026.