Researchers at the National Institutes of Health have created a mathematical model - and an accompanying online weight simulation tool - of what happens when people of varying weights, diets and exercise habits try to change their weight. The findings challenge the commonly held belief that eating 3,500 fewer calories - or burning them off exercising - will always result in a pound of weight loss. Instead, the researchers' computer simulations indicate that this assumption overestimates weight loss because it fails to account for how metabolism changes...
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