Last data update: May 13, 2024. (Total: 46773 publications since 2009)
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Query Trace: Wall MI[original query] |
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Trends by age in youth physical activity: Youth Media Campaign Longitudinal Survey
Wall MI , Carlson SA , Stein AD , Lee SM , Fulton JE . Med Sci Sports Exerc 2011 43 (11) 2140-7 PURPOSE: To characterize longitudinal age trajectories across 5 years in prevalence of free-time and organized physical activity participation among U.S. youth, by sex, race, and parental education. METHODS: Study participants were a nationally representative sample of youth, 9-13 years old in 2002, who participated in the Centers for Disease Control and Prevention's Youth Media Campaign Longitudinal Survey. Baseline data were collected in 2002. Attrition over the next four years resulted in an overall response rate of 23% by 2006 (n=1,623). The survey collected information concerning respondents' frequency of participation in free-time and organized physical activities outside of school. Organized activities were defined as activities involving a coach, instructor, or other leader. Orthogonal polynomial contrasts were used to test for linear and quadratic trends in respondents' participation free-time and organized physical activity sessions during the previous 7 days over ages 9-17. Pairwise t-tests were used to determine whether age-specific estimates of participation rates differed significantly by sex, race, and parental education level. RESULTS: Free-time physical activity participation prevalence declined linearly from ages 9 to 17 in both sexes but also demonstrated a quadratic trajectory in boys, peaking at age 13. Organized physical activity demonstrated a quadratic trajectory and declined most notably after age 14 in both sexes. Free-time physical activity participation was lower in girls compared to boys between ages 12-16 (difference range: 12-17 percentage points). Both non-white youth and those with less educated parents had lower organized physical activity participation at most ages (difference range: 15-29 percentage points). CONCLUSION: Free-time and organized physical activity exhibit different trajectories between ages 9-17 and are subject to dissimilar demographic level variation. |
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