The Big Fat Wedding Walk

Sabrina and Casey are in their mid-20s, but they're both on blood pressure medication, and are afraid that they won't be able to keep up with their future children if they don't get in shape. With their wedding just four months away, trainer Lauren has a few surprises to get them to their target weights in time. In the end, they've got a big surprise for her too, but can these lovebirds make it through the 500-mile walk without each other?

Bobbi beat breast cancer with the support of her fiancé, but she gained a lot of weight in the process. Courtney's father died of a heart attack, and he doesn't want history to repeat itself. With the help of trainer Lauren, they're determined to lose as much weight as they can before their upcoming wedding, but it won't be easy. Sticking to their diets and workout routines proves more difficult than they imagined. They defeated cancer, but can they defeat the 500-mile walk down the aisle?

For Lacey and Allen, weight problems run in the family. Allen's father needs bypass surgery soon, and Lacey's overweight mother died when Lacey was just 16. She wants to lose 60 pounds, and he wants to lose 100, but aggressive goals require an aggressive workout. When their first workout pushes them right up to their physical breaking points, things look almost impossible. With a lot of hard work, they just might be able to beat both these goals and the 500-mile walk down the wedding aisle.