Exercise in Futility

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Why excercise won't make you lose weight.  Believe it or not, this is not surprising new science; experts have been saying this for years.  The conflation of health and obesity has lead us to confuse the goals.  We're told to exercise because it will make us thin, which it won't.  But it will make us healthy.  Unfortunately, health is a distinctly secondary goal for most people at the gym.

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Megan McArdle is a columnist at Bloomberg View and a former senior editor at The Atlantic. Her new book is The Up Side of Down.

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