Fritz, Nicole B., Javier Gene-Morales, Angel Saez-Berlanga, Carlos Babiloni-López, Alvaro Juesas, and Juan Carlos Colado. 2021. “Effect of Physical Activity on COVID-19 Symptoms: A Narrative Review”. Journal of Human Sport and Exercise 16 (4proc):S2042-S2056. https://doi.org/10.14198/jhse.2021.16.Proc4.52.