Forest plots of PA changes during Covid-19 for Children and Adolescents, Adults, and Older Adults. Studies are presented in alphabetical order, with those representing more than one age group being presented at the lower part of each forest plot, followed by studies using device-based measurements. Abbreviations: SR: self-reported, DB: device-based; PA: physical activity, LTPA: leisure-time physical activity, WHO: World Health Organization, LPA: low physical activity, MPA: moderate physical activity, VPA: vigorous physical activity, MVPA: moderate-to-vigorous physical activity, PAL: physical activity levels. Note: The 46 studies included in the quantitative meta-analysis with the respective reference numbers can be found in Table 2.