Zamarripa, Jorge, et al. “Nivel De Actividad física Y Conductas Sedentarias Antes Y Durante El Confinamiento a Causa Del COVID-19 En Adultos Mexicanos (Level of Physical Activity and Sedentary Behaviors before and During Confinement Due to COVID-19 in Mexican Adults)”. Retos, vol. 42, Oct. 2021, pp. 898-05, https://doi.org/10.47197/retos.v42i0.87278.