10 years ago, JP Caudill couldn't run a mile. Recently, he ran seven marathons in seven days across all seven continents.

By the time we hit 30, many of us are wrapping up whatever athletic accomplishments we'll ever set out to achieve. Caudill was just getting started.

"I knew running was something I was bad at and didn’t enjoy," Caudill said. "So, I just a set a goal of one mile on the treadmill at the gym."

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