O’Brien T, Lynch A. The Impact of the COVID-19 Lockdown Restrictions on Physical Activity Levels in European Adolescents: A Systematic Review and Meta-Analysis. ESJ [Internet]. 2023 Jul. 31 [cited 2025 Apr. 19];19(21):1. Available from: https://test.eujournal.org/index.php/esj/article/view/17042