How the COVID-19 pandemic and related school closures reduce physical activity among children and adolescents in the WHO European Region: a systematic review and meta-analysis.
Helena Ludwig-WalzWaldemar SiemensSarah HeinischIndra DannheimJulika LossMartin BujardPublished in: The international journal of behavioral nutrition and physical activity (2023)
PROSPERO: CRD42023395871.