Gomes L, Martins J, Ramos M, Carreiro da Costa F. Niveles de actividad física de adolescentes portugueses en el primer periodo de confinamiento por la pandemia de COVID-19 y las primeras actividades de profesores y entrenadores: un estudio transversal(Physical activity levels of Portuguese adolescents in the first period of confinement due to the COVID-19 pandemic and the first activities of teachers and coaches: a cross-sectional study). Retos [Internet]. 2023 Jan. 2 [cited 2025 Dec. 16];47:701-9. Available from: http://207.180.252.49/index.php/retos/article/view/93923