One of the strangest The Biggest Loser moments ever occurred in 2009, when trainer Bob Harper completely lost it with competitor Joelle Gwynn.

Netflix's Fit for TV: The Reality of the Biggest Loser, which released on August 15, 2025, replayed Joelle Gwynn and trainer Bob Harper's heated altercation from season 7 of The Biggest Loser. It brought both Joelle and Bob back together, allowing them to share their sides of the 2009 argument, sparking outrage among internet users.

This The Biggest Loser contestant did some deep reflection on her time in the show. Joelle Gwynn was one alum of the NBC reality show who appeared on Fit for TV: The Reality of The Biggest Loser, and she revealed her scathing thoughts on one of the coaches who berated her.

Witness the explosive confrontation as a Black ‘Biggest Loser’ contestant takes on celebrity coach in a profanity-laced showdown. 💥

It's no wonder then, that Netflix decided to take a deep-dive into The Biggest Loser, interviewing former contestants, coaches, and health experts to expose what it was really like to appear on the hit show. With that being said, here's 12 of the most shocking revelations that Fit for TV uncovers...

The Reality Of The Biggest Loser is a 3-part docuseries, directed by Skye Borgman, that takes a look at the legacy of The Biggest Loser, the US reality competition series that ran from 2004-16.

"The temptation challenges were the hardest part of the show for me," Sweeney says in Netflix's docuseries, 'Fit for TV: The Reality of The Biggest Loser'