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How many calories does it take to reach childhood obesity prevention goals?
Date:4/9/2012

In order for the nation to achieve goals set by the federal government for reducing obesity rates by 2020, children in the United States would need to eliminate an average of 64 excess calories per day, researchers calculated in a study published today in the American Journal of Preventive Medicine. This reduction could be achieved by decreasing calorie intake, increasing physical activity, or both. Without this reduction, the authors predict that the average U.S. youth would be nearly four pounds heavier than a child or teen of the same age was in 2007-2008, and more than 20% of young people would be obese, up from 16.9% today.

"Sixty-four calories may not sound like much individually, but it's quite a consequential number at the population level, and children at greatest risk for obesity face an even larger barrier," says Y. Claire Wang, MD, ScD, assistant professor of Health Policy and Management at Columbia University's Mailman School of Public Health and lead author of the study. "Closing this gap between how many calories young people are consuming and how many they are expending will take substantial, comprehensive efforts."

The daily difference between how many calories young people consume and how many they expend through normal growth, body function and physical activity is known as the energy gap. The 64-calorie difference between consumption and expenditure is an average for the population. Dr. Wang and her colleagues note it is not intended to represent a change for any individual young person, and that many young people would need to see even greater reductions.

In particular, children and teens who currently have higher obesity rates would require larger energy gap reductions to reach the obesity rate goal. For instance, based on their current obesity rates, white youths would need a 46-calorie reduction, on average, in their energy gap to reach the goals. But given their higher obesity rates in 2008-2010, the a
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Contact: Timothy S. Paul
tp2111@columbia.edu
212-305-2676
Columbia University's Mailman School of Public Health
Source:Eurekalert

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