Diet and Exercise in Obese Subjects: Self-Report Versus Controlled Measurements

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Abstract
Past decades have witnessed a continuing discussion on the relative role of food intake in the pathogenesis of obesity. Some observers argue that overeating is paramount; others claim that the obese are metabolically more efficient in energy utilization, and thus may not need as much food. There is a considerable amount of evidence that big people do need more food than those who are smaller and thinner. However, a recent study using advanced techniques has revealed a clear discrepancy between self-reported and actual energy intake and self-reported and actual physical activity in obese subjects, especially those who had great difficulty in losing weight by dietary means.

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