Teacher reveals how he lost 100 pounds, qualified for Boston Marathon

Andy Bell's weight loss journey began with a 5K race.

Andy Bell, of Lewisberry, Pennsylvania, completed the 26.2-mile race in brutal conditions. As the race began Monday in Hopkinton, Massachusetts, the temperature was 40 degrees with a wind chill of 29 degrees, and wind gusts reached 30 mph.

Bell’s transformation from out-of-shape high school basketball coach to an athlete running in one of the world’s most exclusive marathons began with a simple 5K race on Thanksgiving that he says his wife forced him to enter.

“She wanted to run a local Turkey Trot,” Bell, 45, told ABC News. “I thought it was the dumbest idea ever, but she wanted to do it and signed us up.”

At nearly 300 pounds, Andy Bell decided he would run for 10 minutes on a treadmill at his high school’s gym after basketball practice ended every day.

“Two minutes in [the first 10-minute run] I had to hit the stop button,” he recalled. “There was a bench nearby and I sat down and just put my head in my hands and was crying.”

He continued, “I could not believe it had gotten to this point. I was only 39 years old.”

Andy Bell decided to eliminate fried food and soda from his diet. He kept running on the treadmill every day, just aiming to run 30 seconds or one minute more than the day before.

Andy Bell, who played multiple sports in high school, completed the Turkey Trot and learned that he loved to run.

“[In high school], running was always the punishment for doing what you weren’t supposed to do,” he said. “I was as surprised as anyone that I enjoyed how I felt not only after the run but during the run.”

“I just discovered I was at peace when I was running and it just fueled me to keep adding time,” said Andy Bell, who does not listen to music when he runs, focusing instead on his heartbeat, his steps and the environment around him.

The more he ran, the more weight he lost. The more weight he lost, he said, the faster he ran.

Within one year, Andy Bell said he lost 100 pounds.

"Once he decides to do something, he gives all of himself to it," Heidi Bell said of her husband. "It's nice to be reminded that we're capable or more than we think we are, and he's a perfect reminder of that."

Andy Bell, who is now a certified personal trainer, qualified for this year’s Boston Marathon in his age group by more than six minutes.

He wakes up at 4:55 a.m. to get his workout done before his wife and three daughters start their days. He follows an eating plan of “everything in moderation,” he said.

“I have a healthy combo of vegetables, good carbs (multi-grain bread) and lean meat like turkey,” he said. “After a long run on the weekends I like to treat myself to a diet soda.”

He and his wife made their trip to Boston a celebration weekend, marking the longest time the two have been apart from their kids since their oldest, 19, was born.

“We’re viewing this as our celebration,” said Andy Bell, who had a racing shirt custom-made for the marathon with his wife and daughters’ names on his sleeves.

When asked before the marathon what he was most looking forward to, he quickly replied, “seeing the finish line.”

“I don’t think there’s anything anyone wants to see more than that,” he said. “I’d imagine the emotions and reactions will be very similar to that first two-minute run I had.”

“[I’ll be] collapsed, head in my hands and the emotions will be flowing,” Andy Bell said.