“…The COVID-19 pandemic caused by the SARS-CoV-2 virus and the subsequent preventive actions to reduce the number of contagions (social distancing, lockdown, quarantines, lockout, etc.) modified the habits of the population [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ] and caused different physical, psychological, and social effects [ 20 , 21 , 22 , 23 , 24 , 25 ]. In the childhood and youth population, which already exhibited physical activity values below the general recommendations ahead of the pandemic [ 26 , 27 ], these events and policies further reduced physical activity levels and increased sedentary behaviour [ 28 ].…”