The Reality of the Biggest Loser is on Netflix, find out why host Alison Sweeney left the show and what she does now.

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.

Netflix's tell-all docuseries about 'The Biggest Loser' featured interviews with former contestants, trainer Bob Harper and more — but not Jillian Michaels

Rachel Frederickson won The Biggest Loser Season 15 in 2014 after losing a staggering 155 pounds, dropping from 260 pounds to just 105, meaning she’d shed nearly 60% of her body weight over the course of the competition. When she stepped on stage at the finale, viewers, fellow contestants, and even the show’s trainers appeared visibly stunned.

Netflix is dropping this three-part docuseries called Fit for TV: The Reality of the Biggest Loser on August 15, 2025. If you ever wondered what went down behind the scenes on that show, this is your ticket. You can stream it anywhere, anytime, as long as you’ve got Netflix.