Impact of social isolation on the level of physical activity in young Brazilian athletes caused by COVID-19 - da Silva, L. F.; de Almeida-Neto, P. F.; BulhÕes-Correia, A.; de Queiros, V. S.; Matos, D. G.; Silva Dantas, P. M.; de Araujo Tinoco Cabral, B. G. (The Journal of Sports Medicine and Physical Fitness, 2021)