Kemper has lived Colorado Springs since 1998 where he swims, bicycles and runs to stay in shape to compete.
At the age of 36, he remains in top physical shape thanks in part to his attention to nutrition.
"As you get older you got to use certain tricks because I think your body tends to and can easily gain weight as you get older and you can't keep it off as easy so yeah I gotta really try to be as lean as possible." Kemper said.
As part of his nutritional plan Kemper tries to eat smaller meals every 2-3 hours so that his metabolism remains high.
A slower metabolism causes the body to store the food as fat.
"You want to be mindful of what you put in your body and make sure almost like a gas tank, when you go fill it up do the high octane verses the low grade and that's what I am trying to do with my body as well."
You can watch Kemper and the rest of the U.S. Olympic team compete this summer in London.
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