Physical activity as a predictor of body composition in American Indian children.

Published

Journal Article

OBJECTIVE: To examine physical activity in second grade American Indian children as a predictor of percentage body fat 3 years later. RESEARCH METHODS AND PROCEDURES: Physical activity was assessed as average vector magnitude (AVM) counts from an accelerometer in 454 second grade children as part of the Pathways study. BMI was assessed, and skinfolds and bioelectrical impedance were used to estimate fat mass, fat-free body mass, and percentage body fat in validated prediction equations. Associations were examined using mixed models regression controlling for baseline body composition. RESULTS: In normal-weight children, higher AVM counts were significantly associated with decreases in percentage body fat. Among overweight children, higher AVM counts were significantly associated with increases in BMI, fat mass, and fat-free mass but not percentage body fat. DISCUSSION: Higher physical activity levels in second grade were associated with lower levels of percentage body fat in fifth grade in normal-weight but not in overweight children. BMI showed no association with physical activity among normal-weight children, and increases in BMI were associated with increasing amounts of physical activity among overweight children. These findings emphasize the importance of valid body composition measures and may indicate important differences in associations between physical activity and adiposity in normal-weight as compared with overweight children.

Full Text

Duke Authors

Cited Authors

  • Stevens, J; Suchindran, C; Ring, K; Baggett, CD; Jobe, JB; Story, M; Thompson, J; Going, SB; Caballero, B

Published Date

  • December 2004

Published In

Volume / Issue

  • 12 / 12

Start / End Page

  • 1974 - 1980

PubMed ID

  • 15687399

Pubmed Central ID

  • 15687399

International Standard Serial Number (ISSN)

  • 1071-7323

Digital Object Identifier (DOI)

  • 10.1038/oby.2004.248

Language

  • eng

Conference Location

  • United States