Bob Harper and Jillian Michaels used to look like the perfect trainer duo on The Biggest Loser, but behind the scenes, things weren’t so smooth as seen on Fit for TV: The Reality of The Biggest Loser.

From tension between Bob Harper and Jillian Michaels to one contestant nearly dying on the set, the new series was full of secrets.

The documentary Fit for TV: The Reality of the Biggest Loser revealed that weight regain affected the majority of previous contestants. This pattern suggests that the show's extreme methods were not sustainable for long-term health. The lack of aftercare support may have contributed to these disappointing outcomes for the contestants.