PDS 70: Green space, Johan Friso Foyer, Floor 1, August 28, 2019, 1:30 PM - 3:00 PM Epidemiological and health geography research has found mixed support for the idea that better availability of natural environments is related to higher physical activity attainment. Often this is because the relationship is limited by the definitions of “physical activity” and “natural environment”, and direct use of natural environments is not considered. We examined associations between different metrics of blue space accessibility (coastal proximity, blue space proximity, surface water coverage in radial buffers) and the amount of leisure-time physical activity or walking undertaken in the last week in 18 countries using mixed models. Using the BlueHealth International Survey (a harmonised 18-country survey primarily focused on the relationship between recreational contact with blue spaces and human health and wellbeing), we were also able to detect whether energy expenditure on recreational visits to blue space mediated the relationship between access to blue spaces and physical activity. We detected mixed relationships between blue space accessibility and physical activity attainment, with strong between-country differences. In addition, different accessibility metrics yielded different results. Results of mediation analyses will be presented at the conference. The findings have implications for urban planning and the protection of blue spaces as a public health resource, but no universal conclusions can be made regarding blue space accessibility and physical activity outcomes. The results additionally suggest choosing accessibility metrics based on theories or models of the exposure-health relationship as it can greatly influence conclusions.
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