期刊
OBESITY RESEARCH
卷 12, 期 12, 页码 1974-1980出版社
NORTH AMER ASSOC STUDY OBESITY
DOI: 10.1038/oby.2004.248
关键词
accelerometry; BMI; body fat; longitudinal; overweight status
资金
- NHLBI NIH HHS [HL-50907, HL-50869, HL-50885, HL-50905, HL-50867] Funding Source: Medline
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.
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