How Presidents age in office

Jay Hart
Yahoo Sports
The Sideshow

If the typical person ages one year at a time, the typical president, Dr. Michael Roizen told CNN in 2009, ages two years for every year they are in office.

And it shows.

Take a look at how the last three presidents aged from the moment they took office to the moment they left, or, in Barack Obama's case, through four-plus years.

President Obama was 47 when he took office. He's 52 now.

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George W. Bush was 54 when he took office. He was 62 when he left.

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Bill Clinton was 46 when he took office. He was 54 when he left.

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