A growing body of research shows that our food, mood, and exercise habits are strongly influenced by the behavior of other people in our networks. I bet that our sleep habits are too, although as far as I know, there is little research on that subject. Our weight is thus strongly influenced by the habits of those around us. So we’re quite right to say we’re having an obesity epidemic: obesity indeed spreads from one person to the next, just as other diseases do. But what can we do about it?
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