Five months ago, Aaron Hepker couldn't walk up the stairs without taking a breather.
"I measure what I can do based on how far I can walk," Hepker told us back then.
Now, barely a day goes by that he doesn't hit the gym.
"Aaron has blown past a lot of goals I've set for him," said his personal trainer and owner of Infinity Training Center Terri Good. "As a matter of fact, he's kind of hard to keep up with."
Exercise is no longer a chore for Hepker, who admits he couldn't have imagined doing these workouts last September.
"I'm enjoying boxing and the cardio circuits because it can really push my limits, and it's just nice to get a good sweat going."
Exercise has become a way of life and a way to manage stress. In addition to losing 55 pounds, Hepker has lost a significant number of inches and improved his flexibility, strength and aerobic capacity.
"I can do things," Hepker said. "I can be with people and do things they're doing."
He recently walked around Jordan Creek Mall "without breaking a sweat," he said. That's a big deal, both physically and psychologically.
You can feel his self-confidence grow with each successful workout.
Of course, those rewards don't come without sacrifice, commitment and courage. Aaron offers this advice to others who are struggling with obesity.
"There's a definite sense of hopelessness, but just take that first step and you'll slowly make strides, but take the first step."
Click here to see all segments of Hepker's Challenge.