Age-Related Change in Physical Activity in Adolescent Girls

Russell R. Pate, June Stevens, Larry S. Webber, Marsha Dowda, David M. Murray, Deborah R. Young, Scott Going

    Research output: Contribution to journalArticle

    Abstract

    Purpose: To determine the annual rate at which physical activity changes in girls during middle school using both objective and self-report measures of physical activity. Methods: Participants were sixth- and eighth-grade girls from the control schools in the Trial of Activity for Adolescent Girls (TAAG). Random cross-sectional samples initially were drawn from sixth-grade girls (n = 786) and 2 years later from eighth-grade girls (n = 1545). A cohort of 501 girls was in both the sixth- and the eighth-grade samples. The girls wore an accelerometer for 6 days and completed the 3-Day Physical Activity Recall. Data were summarized using 3.0-, 4.6-, and 6.5-metabolic equivalent cutpoints for accelerometry and self-reported physical activity. Analyses were performed using repeated-measures analysis of variance in PROC MIXED. Results: More than 40% of the girls were white, approximately 20% were African American, and 20% were Hispanic. The annual percent decrease in physical activity in the cross-sectional sample was approximately 4% (-1.76 min moderate-to-vigorous physical activity/day), using accelerometer data. The percent decrease in physical activity based on self-report data was higher, 6% to 13%, depending on the physical activity variable. Declines tended to be larger in African American girls, but the ethnic differences were not statistically significant. Conclusions: Based on comparisons of cross-sectional samples of sixth- and eighth-grade girls, objectively measured physical activity declined at a rate of 4% per year.

    Original languageEnglish (US)
    Pages (from-to)275-282
    Number of pages8
    JournalJournal of Adolescent Health
    Volume44
    Issue number3
    DOIs
    StatePublished - Mar 1 2009

    Keywords

    • Accelerometry
    • Adolescents
    • Girls
    • Middle school
    • Physical activity

    ASJC Scopus subject areas

    • Pediatrics, Perinatology, and Child Health
    • Public Health, Environmental and Occupational Health
    • Psychiatry and Mental health

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  • Cite this

    Pate, R. R., Stevens, J., Webber, L. S., Dowda, M., Murray, D. M., Young, D. R., & Going, S. (2009). Age-Related Change in Physical Activity in Adolescent Girls. Journal of Adolescent Health, 44(3), 275-282. https://doi.org/10.1016/j.jadohealth.2008.07.003