Meet the World's Heaviest Marathon Runner -- 430lbs

At 430 pounds, Kelly Gneiting is the heaviest person ever to finish a marathon.

The 6-foot-tall champion sumo wrestler officially set the Guinness world record after finishing a marathon in Los Angeles Sunday, the LA Times reports.

His time may not be competitive with most marathon runners -- 9 hours, 48 minutes and 52 seconds -- but he destroyed the old record of 275 pounds and improved his own personal best time by more than two hours.

"I honestly think I'm one of the best athletes in the world," he said prior to the race.

How'd he do it?

Kelly jogged the first 8 miles of the race and walked the final 18. "I was really struggling in the last five miles, but I said to myself, 'If I have to crawl, I will.'"

Here's a video of his journey: