A study of community design, greenness, and physical activity in children using satellite, GPS and accelerometer data.

  • Almanza E Jerrett M D
  • Almanza E
  • Jerrett M
 et al. 
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This study examined relationships between greenness exposure and free-living physical activity behavior of children in smart growth and conventionally designed communities. Normalized Difference Vegetation Index (NDVI) was used to quantify children's (n=208) greenness exposure at 30-s epoch accelerometer and GPS data points. A generalized linear mixed model with a kernel density smoothing term for addressing spatial autocorrelation was fit to analyze residential neighborhood activity data. Excluding activity at home and during school-hours, an epoch-level analysis found momentary greenness exposure was positively associated with the likelihood of contemporaneous moderate-to-vigorous physical activity (MVPA). This association was stronger for smart growth residents who experienced a 39% increase in odds of MVPA for a 10th to 90th percentile increase in exposure to greenness (OR=1.39, 95% CI 1.36-1.44). An individual-level analysis found children who experienced >20. min of daily exposure to greener spaces (>90th percentile) engaged in nearly 5 times the daily rate of MVPA of children with nearly zero daily exposure to greener spaces (95% CI 3.09-7.20). ?? 2011 Elsevier Ltd.

Author-supplied keywords

  • Built environment
  • GPS
  • Greenspace
  • Obesity
  • Physical activity
  • Smart growth

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  • Dunton G Seto E Ann Pentz M Almanza E Jerrett M

  • Estela Almanza

  • Michael Jerrett

  • Genevieve Dunton

  • Edmund Seto

  • Mary Ann Pentz

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