Ness, AR and Leary, S.D. and Mattocks, C. and Blair, S.N. and Reilly, John J and Wells, JCK and Ingleby, K. and Tilling, K. and Davey-Smith, G. and Riddoch, C. (2007) Objectively measured physical activity and fat mass in a large cohort of children. PLOS Medicine, 4 (3). pp. 1-9.Full text not available in this repository. (Request a copy from the Strathclyde author)
Previous studies have been unable to characterise the association between physical activity and obesity, possibly because most relied on inaccurate measures of physical activity and obesity. We carried out a cross sectional analysis on 5,500 12-year-old children enrolled in the Avon Longitudinal Study of Parents and Children. Total physical activity and minutes of moderate and vigorous physical activity (MVPA) were measured using the Actigraph accelerometer. Fat mass and obesity (defined as the top decile of fat mass) were measured using the Lunar Prodigy dual x-ray emission absorptiometry scanner. We found strong negative associations between MVPA and fat mass that were unaltered after adjustment for total physical activity. We found a strong negative dose-response association between MVPA and obesity. The odds ratio for obesity in adjusted models between top and the bottom quintiles of minutes of MVPA was 0.03 (95% confidence interval [CI] 0.01-0.13, p-value for trend <0.0001) in boys and 0.36 (95% CI 0.17-0.74, p-value for trend = 0.006) in girls. We demonstrated a strong graded inverse association between physical activity and obesity that was stronger in boys. Our data suggest that higher intensity physical activity may be more important than total activity.
|Keywords:||physical activity , obesity , Personal health and hygiene, including exercise, nutrition , Medicine(all)|
|Subjects:||Medicine > Public aspects of medicine > Personal health and hygiene, including exercise, nutrition|
|Department:||Faculty of Humanities and Social Sciences (HaSS) > School of Psychological Science and Health > Physical Activity for Health|
|Depositing user:||Pure Administrator|
|Date Deposited:||04 Nov 2011 11:09|
|Last modified:||23 Sep 2016 02:29|