Mercê, C., Cordeiro, J., Romão, C., Branco, M., & Catela, D. (2023). Niveles de Actividad Física en Niños: Impacto de la Pandemia Covid-19 (Levels of Physical Activity in Portuguese Children: the Impact of the Covid-19 Pandemic). Retos, 47, 174–180. https://doi.org/10.47197/retos.v47.94936