Thirty-five-year-old Andrei Nana is not your average runner.
"If I come out to run I want to feel like I'm dying by the time I finish. Otherwise it's not worth it," Nana said.
Three years ago he started running to get over a breakup with his fiancee. After that he just kept running.
"It's addictive," he said.
Three or four miles for the former National Guardsman just kept multiplying.
On Wednesdays, he runs all night and doesn't sleep, he said.
"The cops know me," he explained, on the strip he runs on Hollywood Beach.
"It's a sport," he said.
He's what's known as an ultrarunner , a person who runs races lengths of 100 miles or more. His longest was a 134-mile race around Lake Okeechobee.
He'll run Relay For Life in Weston with his mom on his mind this Saturday. She was diagnosed with ovarian cancer in 2008.
He ran 14 hours nonstop for the fundraising event last year. This time, he and some friends are aiming for 24.
When he's on the run, he'll scarf down pizza or even guzzle a beer.
"It's good for cooling ... hydration," he said smiling.
For him, running ad nauseum is about overcoming obstacles and that little voice inside your head he calls the "voice of reason," which tells you to stop.