Mac also takes time to share his story with others struggling with obesity. He occasionally speaks to kids at the YMCA of Metropolitan Fort Worth, encouraging them to begin healthy nutritional habits early. He recently took two 500-pound men grocery shopping, invited them to his house to show them the types of foods he now eats and gave them some of his old regular and workout clothes.
Scrivner says he believes Mac's story is better than a personal trainer for those trying to lose weight, because he has walked in their shoes.
"He's about the most inspirational person I know."