“…For older adults, being confident to be physically active and having social support is positively correlated with PA, while feeling too old has an adverse effect (Bauman and Bull, 2007;Carlson et al, 2012). Next to individual characteristics, the relation of neighbourhood built environment factors and PA has been widely studied in the past, mainly showing that people living in highly walkable neighbourhoods tend to be more physically active (Berke et al, 2007;Frank et al, 2010;King et al, 2011;Marshall et al, 2014;Van Holle et al, 2014;Marquet and Miralles-Guasch, 2015). However, a study based on a national survey on Canadian adults reports that there is a positive association between neighbourhood greenness in a 500 m buffer around the home location and leisure-time PA (McMorris et al, 2015).…”