He breaks from routine every once in awhile, though.
"In May I turned 34 and decided to splurge," Gibson said. "We went to a vegan bakery and got a slice of the hummingbird cake, which we split. I hadn't had cake since 2010."
Gibson also exercises daily. "Spinning is my favorite. I like to do two 70-minute spin classes back-to-back," Gibson said. He also runs at least 3 miles in the evening and does crunches and push-ups before bed.
Gibson stays focused with the help of a coach, Ryan Blanck, CEO of offtrackonpurpose.com. Blanck lives in North Carolina, so all their sessions are virtual. Gibson finds their sessions particularly effective.
"He gives me positive encouragement and tough love. I remember one time he said, 'Your motivation isn't where it once was.' That's all I needed to hear. When I went to the gym that day I told my wife drop me off further away -- I need the walk."
This healthy living has paid off. In addition to the weight loss, Gibson no longer needs high blood pressure medicine. He says he's "got energy for days."
He also loves to motivate others and talks about his weight loss at church and helps friends.
"This weight loss has transformed my life," Gibson said. "It's totally possible. You just have to hold yourself accountable."