Fit to Fat to Fit

Fit for his whole life and a trainer for 13 years, JJ is known as "Superman" to his wife and kids.

Steve, a trainer of 23 years and his wife Bonnie are known in their small town as "the fit couple." Tasha, wife and mother of three hasn't been in shape in years.

When Adonis found himself overwhelmed with depression as a young man, the solution he found to overcome it was fitness.

With a degree in dietetics and 17 years of experience as a trainer, Alex has fitness down to a science. Geoff is a foodie and young professional who wants to lose weight for his upcoming wedding.

Corey is a young and ambitious personal trainer who loves to push his clients to their limits. Raela is a preacher's daughter.

Since becoming a trainer three years ago, Katie's obsession with health and fitness fuels her passion for experiencing life.

27-year-old outdoor enthusiast and gym owner Carrie loves inspiring women to lead healthy lives.

Fallon, an energetic personal trainer and celebrity fitness correspondent has no idea what it's like to be overweight.

Seth, a yoga instructor and gym owner in South Florida, is destroying his body in order to get his client Dave to change his unhealthy ways.

Tramell, a young bodybuilder and business owner has one of the best bodies in the country. Jason and Johnny, nicknamed "salty and sweet" enable each other.