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Objectively Measured Physical Activity And Fat Mass In A Large Cohort Of Children, Andy R. Ness, Sam D. Leary, Calum Mattocks, Steven N. Blair, John J. Reilly, Jonathan Wells, Sue Ingle, Kate Tilling, George Davey Smith, Chris J. Riddoch
Objectively Measured Physical Activity And Fat Mass In A Large Cohort Of Children, Andy R. Ness, Sam D. Leary, Calum Mattocks, Steven N. Blair, John J. Reilly, Jonathan Wells, Sue Ingle, Kate Tilling, George Davey Smith, Chris J. Riddoch
John Reilly
Background: 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.
Methods and Findings: 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 …