The show is co-hosted by personal trainer Tommy Europe and nutrition specialist Nadeen Boman.
Seamstress Jean Okada evaluates how well the brides fit into their wedding gowns.
Next, Europe uses a computer simulation to depict what the bride will look like in a few years based on her current diet and activity and the fact that many brides gain a lot of weight during the first few years of marriage.
Partway through the weight loss regimen, the bride's measurements are taken, and she tries on her wedding gown.
For the final push, Europe enlists the bride's fiancé to join her and provide support in a run to the top of "Cardiac Hill".