Association of environment and policy characteristics on children's moderate-to-vigorous physical activity and time spent sedentary in afterschool programs.

Authors:
Rahma Ajja
Rahma Ajja
University of South Carolina
United States
Morgan N Clennin
Morgan N Clennin
Arnold School of Public Health
Dr. Justin B Moore, PhD, MS
Dr. Justin B Moore, PhD, MS
Wake Forest School of Medicine
Associate Professor
Implementation Science, Epidemiology
Winston-Salem, NC | United States
Jennifer L Huberty
Jennifer L Huberty
University of Nebraska Omaha
United States
Dianne S Ward
Dianne S Ward
University of North Carolina at Chapel Hill
United States
Russell R Pate
Russell R Pate
University of South Carolina
United States
Michael W Beets
Michael W Beets
University of South Carolina
United States

Prev Med 2014 Dec 22;69 Suppl 1:S49-54. Epub 2014 Sep 22.

Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States.

Background: Afterschool programs are an important setting in which to promote children's physical activity. This study examines the association of environmental and policy characteristics on the moderate-to-vigorous physical activity and sedentary behavior of children attending afterschool programs.

Methods: A total of 1302 children attending 20 afterschool programs across South Carolina wore accelerometers (ActiGraph GT3X+) for up to 4non-consecutive days. Policy-level characteristics were evaluated using the Healthy Afterschool Program Index-Physical Activity scale. Physical activity space was measured using a measuring wheel (indoor, ft(2)) and Geographical Information Systems software (outdoor, acres). The structure (free-play or organized) of activity opportunities was evaluated via direct observation. Time spent in moderate-to-vigorous physical activity and sedentary, both indoors and outdoors, was estimated using accelerometry.

Results: For every 5000 ft(2) of utilized indoor activity space an additional 2.4 and 3.3 min/day of sedentary behavior was observed among boys and girls, respectively. A higher ratio of free-play to organized play was associated with higher indoor sedentary behavior among boys and girls (3.9 min/day and 10.0 min/day, respectively). For every 1 acre of outdoor activity space used, an additional 2.7 min/day of moderate-to-vigorous physical activity was observed for boys. A higher free-play to organized play ratio was associated with higher outdoor moderate-to-vigorous physical activity for boys and girls (4.4 and 3.4 min/day increase, respectively). Policy characteristics were unrelated to moderate-to-vigorous physical activity levels and time spent sedentary.

Conclusion: Findings indicate that policies and size of activity space had limited influence on moderate-to-vigorous physical activity and sedentary behavior, suggesting that a programmatic structure may be a more effective option to improve moderate-to-vigorous physical activity levels of children attending afterschool programs.

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Source
http://dx.doi.org/10.1016/j.ypmed.2014.09.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4268079PMC

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December 2014
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