More than three-quarters of obese Americans say they have healthy eating habits, and 40% say they engaged in "vigorous" exercise at least three times a week, according to a phone survey of more than 11,000 people. "There is, perhaps, some denial going on. Or there is a lack of understanding of what does it mean to be eating healthy, and what is vigorous exercise," one doctor said. Questions regarding the quantities of food eaten were not included in the survey, another doctor noted.
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