Mockery, dangerous weight loss practices and long-term health impacts — “The Biggest Loser” was a TV phenomenon that shaped how Americans view weight.

Michaels was a trainer on “The Biggest Loser” for seasons 1, 2, 4-11, 14, and 15. She often motivated contestants by yelling at them or insulting them. In one clip from “Fit for TV: The Reality of the Biggest Loser,” Michaels pushes a woman to keep exercising even after she vomits on a treadmill.

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 Biggest Loser became a cultural phenomenon when it premiered in 2004 — but the show has been plagued with scandals and controversy as well. When NBC introduced the show, it followed a group of people deemed overweight who would compete in a 30-week competition.

The Biggest Loser' is the subject of the 2025 Netflix docuseries 'Fit for TV: The Reality of the Biggest Loser'

Netflix viewers have reacted in disbelief over 'outrageous' documentary Fit for TV: The Reality of The Biggest Loser, which lifts the veil on the TV series.