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Longitudinal change in active and sedentary behavior during the after-school hour
Eric E Wickel1, Johann Issartel, Sarahjane Belton
1Dept of Exercise and Sports Science, University of Tulsa, Tulsa, OK, USA.
Journal of Physical Activity & Health
|July 24, 2012
Summary
After-school physical activity (MVPA) declines with age in preadolescence, while sedentary time increases. Boys engage in more MVPA than girls, but screen time is higher for boys.
Area of Science:
- Child Development
- Public Health
- Behavioral Science
Background:
- Limited understanding of youth after-school behaviors.
- Focus on active and sedentary activities in preadolescence.
Purpose of the Study:
- Examine gender and age differences in after-school behaviors.
- Analyze moderate-to-vigorous physical activity (MVPA), light-intensity activity, and sedentary time.
Main Methods:
- Longitudinal study of 886 youth (ages 9 and 11).
- Interview-guided time-use approach with 15-min intervals.
- Categorization into MVPA, light activity, sedentary (screen/nonscreen).
Main Results:
- Boys showed higher MVPA than girls; MVPA decreased from age 9 to 11.
- Total sedentary time increased with age.
- Boys had higher screen time, girls higher nonscreen time.
Conclusions:
- Preadolescent after-school behavior undergoes significant changes.
- Further research needed on factors influencing activity choices over time.
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