Does the built environment matter for physical activity?

There has been a dramatic increase in the number of studies that correlate aspects of the built environment with physical activity. Several publications have summarized the state of the field and have made recommendations on how to move the field forward. This paper describes some of the recommendations and reports on recent progress that has been made on them. Specific issues that are addressed are causality, perceived versus objective environmental measures, definitions of a neighborhood, use of audit instruments, and cost-benefit studies.