slimmed-down figure, down to 105 lbs. from her starting weight of 260 lbs. (At 5'4", her height-weight ratio puts her BMI at 18, below the threshold doctors consider normal.)
Sitting down with PEOPLE in Los Angeles, just days after she made headlines for her striking transformation, Frederickson says she maintained a 1,600-calorie daily diet, working out six hours a day in the three months before the finale.
The Biggest Loser' Season 15 finale
Rachel Frederickson walked on stage to applause, wearing a wispy silver dress that showed off her new figure. But it soon sunk in that Frederickson had lost a dramatic amount of weight since the last time viewers saw her.