Funding agencies: This study was supported by NHLBI # R01HL71244.
Energy balance in adolescent girls: The trial of activity for adolescent girls cohort
Article first published online: 9 DEC 2013
Copyright © 2013 The Obesity Society
Volume 22, Issue 3, pages 772–780, March 2014
How to Cite
Cohen, D. A., Ghosh-Dastidar, B., Conway, T. L., Evenson, K. R., Rodriguez, D. A., Beckman, R., Elder, J. P., Pickrel, J. and Lytle, L. (2014), Energy balance in adolescent girls: The trial of activity for adolescent girls cohort. Obesity, 22: 772–780. doi: 10.1002/oby.20536
Disclosure: None of the authors have any financial relationships relevant to this article or other conflicts of interest to disclose.
Author contributions: Deborah A. Cohen was the principal investigator and took the lead in study design and management and preparing the manuscript. Bonnie Ghosh-Dastidar served as the statistician and analyzed the data and helped prepare the manuscript. Terry L. Conway, Kelly R. Evenson, Daniel A. Rodriguez assisted in data analysis, interpretation and manuscript preparation, Robin Beckman conducted descriptive analyses, was responsible or data management and contributed to the manuscript preparation, John P. Elder supervised the study implementation in San Diego, and participated in data analysis and manuscript preparation. Julie Pickrel supervised data collection in San Diego, protocol development, and contributed to manuscript preparation. Leslie Lytle supervised study implementation in Minneapolis and contributed to data analysis and interpretation.
- Issue published online: 5 MAR 2014
- Article first published online: 9 DEC 2013
- Accepted manuscript online: 26 JUN 2013 12:37PM EST
- Manuscript Accepted: 22 MAY 2013
- Manuscript Received: 17 DEC 2012
To study correlates of change in BMI percentile and body fat among adolescent girls.
A longitudinal prospective study following 265 girls from the Trial of Activity for Adolescent Girls (TAAG) cohort measured in 8th grade and during 10 and 11th grade or 11th and 12th grade. Twice during 2009-2011 girls wore an accelerometer and completed a food frequency questionnaire and 7-day diary documenting trips and food eaten away from home and school. Physical activity, BMI, and percent body fat were objectively measured at each time point.
Moderate to vigorous physical activity (MVPA) declined, but the change was not independently associated with changes in BMI percentile. Increased vigorous physical activity was associated with reductions in body fat. Diet was associated with both changes in BMI percentile and body fat. Girls who increased the percentage of caloric intake from snacks and desserts reduced their BMI percentile and body fat.
Some relationships between energy balance behaviors and BMI and body composition were counter-intuitive. While it is plausible that vigorous physical activity would result in reductions of body fat, until more accurate methods are devised to measure diet, the precise contribution of dietary composition to health will be difficult to assess.