Institutional certification for personal trainers in Angola: an alternative for professionalization that benefits public health. RIAF. International Journal of Physical Activity, [S. l.], v. 4, n. 1, p. 41–51, 2026. DOI: 10.53591/2697. Disponível em: https://revistas.ug.edu.ec/index.php/riaf/article/view/2697. Acesso em: 10 apr. 2026.