Obesity rates in the U.S. have inched up slightly over the past decade, mainly because of weight gain among men and boys, new government statistics show. About 69 percent of adults in the U.S. are either overweight or obese; that's up from 64.5 percent in 2000. Gary Foster, director of Temple's Center for Obesity Research and Education, says "rates will continue to confer significant medical, psychosocial and economic consequences for our country."