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Stanford Study: Inactivity, More Than Diet, Linked to Obesity Increase
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New research from Stanford shows that physical activity — or lack thereof — may be a bigger driver of the obesity epidemic than diet is. The researchers looked at national survey results of people’s health habits — including diet and exercise — from 1988 to 2010. The stunner was the increase in people who reported no physical activity.

In 1988, 19 percent of women were completely inactive. By 2010, that number had jumped to 52 percent.

For men, the rate nearly quadrupled, going from 11 to 43 percent in the same time period.

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