 This study aimed to systematically review and quantify the correlations between built environment attributes and physical activity, PA, in older adults. The findings suggest that walkability, safety from crime, access to destinations and services, recreational facilities, parks, shops, greenery, walk-friendly infrastructure and public transport are positively associated with PA. However, the strength of evidence for these associations varies depending on the type of PA, an environmental measurement method. The study also found no consistent moderating effects on the association between built environment attributes and PA. Higher quality research is needed to identify the underlying mechanisms and address individual differences in findings. This article was authored by David W. Barnett, Anthony Barnett, Andrea Nathan, and others. We are article.tv, links in the description below.