MADILL, Okla. (KTEN) — Dan Little is an 80-year-old marathon man.

He explained it this way: "It's the experience of feeling half-dead and never more alive at the same time."

Now the Madill resident is excited to take on the World Marathon Challenge — seven marathons on seven continents in seven days — for the second time in four years.

Back in 2018, Little would never have thought he'd be running any type of marathon... even once.

"Dustin Rowe sent me an article from the New York Times, and on it he had scribbled, 'This is you... do it for your grandchildren.' I read it and thought, 'This is perfect for my grandchildren... but not in the way Dustin was thinking," Little recalled.

In 2019, he started his journey just trying to get to the finish line.

"Put yourself in situations where you're going to do your best, but you're going to fail. So I looked at this and said, 'There's no way I can do seven marathons on seven continents,' but I would train... I would do my best," Little said.

When he completed that achievement as the oldest-ever competitor, he was filled not only with a sense of accomplishment, but surprisingly the desire to do it again some day.

"And this time, I will be 80, and so... i'll just up the record a little bit," he said.

Little said he believes experience is his biggest asset as gets ready to battle the terrain... and Father Time.

"We flew to Madrid, Spain... that was the most difficult race psychologically. It wasn't close enough to smell the barn, and I was miserable, cold, not properly dressed," he recalled.

Now, as Dan Little embarks on his latest adventure, he's determined to enjoy the experience more than his whirlwind 2019 trip around the world.

"I used to do it for health benefits, emotional benefits... and still do. But, now it's fun. It's exciting," he said.

Little leaves Saturday for the first of the seven races at the bottom of the world, in Antarctica. That race is set for Tuesday, January 31. From there, it's off to: