Since 1970, the prevalence of overweight has doubled among Americans, and the prevalence of obesity has quadrupled. As of 2003-2004, 32.2% of Americans (66 million people) were obese.1 The rates of overweight and obesity are growing even faster among adolescents than adults, particularly among girls. In just 6 years, between 1999 and 2004, the prevalence of overweight among girls aged 12 to 19 years increased from 14.0% to 18.2%. There was no change in obesity among women.2
McNeeley C, Crosnoe R. Social Status, Peer Influence, and Weight Gain in Adolescence: Promising Directions for Addressing the Obesity Epidemic. Arch Pediatr Adolesc Med. 2008;162(1):91–92. doi:10.1001/archpediatrics.2007.23
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