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. 2010 Aug;39(2):105-12.
doi: 10.1016/j.amepre.2010.03.016.

The effect of light rail transit on body mass index and physical activity

John M MacDonald  1 , Robert J Stokes, Deborah A Cohen, Aaron Kofner, Greg K Ridgeway
Affiliations

The effect of light rail transit on body mass index and physical activity

John M MacDonald et al. Am J Prev Med. 2010 Aug.

Abstract

Background: The built environment can constrain or facilitate physical activity. Most studies of the health consequences of the built environment face problems of selection bias associated with confounding effects of residential choice and transportation decisions.

Purpose: To examine the cross-sectional associations between objective and perceived measures of the built environment; BMI; obesity (BMI>30 kg/m(2)); and meeting weekly recommended physical activity (RPA) levels through walking and vigorous exercise. To assess the effect of using light rail transit (LRT) system on BMI, obesity, and weekly RPA levels.

Methods: Data were collected on individuals before (July 2006-February 2007) and after (March 2008-July 2008) completion of an LRT system in Charlotte NC. BMI, obesity, and physical activity levels were calculated for a comparison of these factors pre- and post-LRT construction. A propensity score weighting approach adjusted for differences in baseline characteristics among LRT and non-LRT users. Data were analyzed in 2009.

Results: More-positive perceptions of one's neighborhood at baseline were associated with a -0.36 (p<0.05) lower BMI; 15% lower odds (95% CI=0.77, 0.94) of obesity; 9% higher odds (95% CI=0.99, 1.20) of meeting weekly RPA through walking; and 11% higher odds (95% CI=1.01, 1.22) of meeting RPA levels of vigorous exercise. The use of LRT to commute to work was associated with an average -1.18 reduction in BMI (p<0.05) and an 81% reduced odds (95% CI=0.04, 0.92) of becoming obese over time.

Conclusions: The results of this study suggest that improving neighborhood environments and increasing the public's use of LRT systems could provide improvements in health outcomes for millions of individuals.

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Figures

Figure 1
Figure 1
Study area and home locations of survey respondents (n=839)
See this image and copyright information in PMC

References

    1. Transportation Research Board (TRB) Does the built environment influence physical activity: Examining the evidence. Vol. 282. TRB Special report; Washington DC: 2005.
    1. Fenton M. Battling America’s epidemic of physical inactivity: building more walkable, livable communities. J Nutrition, E, Beh. 2005;37(Suppl. 2):S115–120. - PubMed
    1. Boehmer TK, Hoehner CM, Deshpande AD, Brennan-Ramierez LK, Brownson RC. Perceived and observed neighborhood indicators of obesity among young adults. Int J of Obes. 2007;31:968–977. - PubMed
    1. Fox KR, Hillsdon M. Physical activity and obesity. Obesity Rev. 2007;8(Suppl.1):115–121. - PubMed
    1. Farley T, Cohen D. Fixing a fat nation: Why diets and gyms won’t save us from the obesity epidemic. Washington Monthly. 2001

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