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Americans Burn Fewer Calories at Work

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American waistlines have grown in recent decades, but experts don’t fully understand what’s behind the bulge. Now, a study suggests that the changing nature of employment may be to blame. Researchers sifted through decades’ worth of employment data that rank jobs based on how much physical activity is required. The results showed that 50 years ago Americans burned over 100 calories more at work each day on average than they do today. Packing away just those extra calories as pounds, the authors say, would be enough to account for the increase in Americans’ average weight in the past half century.
Source: PLoS ONE, published online May 25, 2011