"Fit to Fat to Fit" follows personal fitness trainers from across the country as they undertake the most extreme weight-loss experiment ever: forcing themselves to gain weight to better understand the struggles of their obese clients as they lose the weight together.
Fit for his whole life and a trainer for 13 years, JJ is known as "Superman" to his wife and kids. His overweight client Ray hopes that slimming down will boost his profile with adoption agencies and bring him and his wife closer to their dream.
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.
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 and a homebody who is trying to love herself enough to get fit.
Since becoming a trainer three years ago, Katie's obsession with health and fitness fuels her passion for experiencing life. Alternatively, Chef Mateo's love for food has completely consumed every aspect of his life.
27-year-old outdoor enthusiast and gym owner Carrie loves inspiring women to lead healthy lives. When not at her gym, she's playing in the mountains with her fiance.
Fallon, an energetic personal trainer and celebrity fitness correspondent has no idea what it's like to be overweight. JD, a red carpet videographer, dreams of having a family but has been finding it difficult.
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.
