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.

The Biggest Loser' host Alison Sweeney opened up about a confrontation with Jillian Michaels that went down on-screen.

Netflix's tell-all docuseries about The Biggest Loser featured interviews with former contestants, trainer Bob Harper and more people associated with the show — but was Jillian Michaels involved? During the third part of Fit for TV: The Reality of the Biggest Loser,