When Joelle Gwynn joined Season seven of The Biggest Loser, she did not come alone. Her close friend Carla Triplett entered the competition with her as her weight loss partner. The two Detroit natives came in with high hopes and supposedly a deep bond. But their friendship was quickly tested under the pressure of the show’s grueling format.

The Biggest Loser is back in the spotlight more than 20 years after it first premiered on NBC. In the new Netflix docuseries Fit for TV: The Reality of The Biggest Loser, former contestants and producers reveal the intense reality behind the success of the weight-loss reality show.