Original Contribution Objectively Assessed Associations between Physical Activity and Body Composition in Middle-School Girls The Trial of Activity for Adolescent Girls

1 Department of Nutrition, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC. 2 Department of Epidemiology, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC. 3 Division of Epidemiology, School of Public Health, Ohio State University, Columbus, OH. 4 Department of Health Promotion and Behavioral Sciences, Graduate School of Public Health, San Diego State University, San Diego, CA. 5 Department of Physiology, College of Medicine, University of Arizona, Tucson, AZ. 6 Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, MN. 7 Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC. 8 Division of Prevention and Population Sciences, National Heart, Lung, and Blood Institute, Bethesda, MD. 9 Center for Human Nutrition, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD. 10 Department of Biostatistics, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA. 11 Department of Kinesiology, College of Health and Human Performance, University of Maryland, College Park, MD.