Risk of bias of a study
High risk of bias	For a study graded as high in at least two domains
Moderate risk of bias	For a study graded as moderate in at least one domain, and rated as low in other domains
Low risk of bias	For a study graded as low in all six domains

Level of evidence of PA-related outcome measures
Strong evidence	Pooled results from two or more studies, at least two of them have high quality; or consistent narrative findings in multiple studies with high-quality
Moderate evidence	Significant pooled results from multiple statistically heterogeneous studies, at least one of them has high quality; or consistent findings from multiple studies with at least one high quality study
Limited evidence	Findings from a high-quality study, or consistent findings from multiple moderate- or low-quality studies
Very limited evidence	Findings from one moderate- or low-quality study
Conflicting evidence	Inconsistent findings