Gonzalez, Felipe, et al. “Nivel De Actividad física En Preescolares Y Escolares Chilenos Durante La Pandemia De Covid-19 (Level of Physical Activity in Chilean Preschool and School Children During the Covid-19 Pandemic)”. Retos, vol. 54, May 2024, pp. 320-7, https://doi.org/10.47197/retos.v54.102268.