Apolo Ohno Training to Compete at Ironman

The most decorated U.S. Winter Olympian in history plans to compete at the world championship in Kailua-Kona, Hawaii, in October. He'll need to swim 2.4 miles, bike 112 miles, then run a marathon.

Ohno won eight medals in three Olympics in short-track speedskating.

His speedskating training was all about performing at his peak for 80 seconds. The Ironman requires preparing his body to hold up over the steady grind of more than 11 hours.

Ohno ran the 2011 New York City Marathon, finishing in a very respectable 3 hours, 25 minutes. Still, his legs will feel very different at the start of the 26.2 miles in Hawaii after the swim and bike.