The third domain includes features related to safety, mobility, and access. Again these factors may operate on late-life health either through a cumulative process on the underlying health trajectory or by directly facilitating/impeding activities in old age. For example, by providing safe places to participate in physical activity, the availability of parks and recreation may facilitate healthy behaviors that have a beneficial affect on health well into late life (Brownson et al, 2001; Jackson & Kochtitzky, 2001). In addition, by enhancing the current environment, such features may promote functioning outside the home in late-life (Centers for Disease Control and Prevention,.
