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"Biggest Loser" winner Rachel Frederickson reacts to weight-loss backlash

Rachel Frederickson, winner of season 15 of "The Biggest Loser."
NBC

"The Biggest Loser" winner Rachel Frederickson is speaking out after her victory on the weight-loss competition series sparked criticism over whether she took things too far.

The 24-year-old shed 155 pounds, going from a starting weight of 260 pounds down to 105 pounds to the season-15 title. Her big reveal on the show’s finale prompted concern from viewers who thought her dramatic weight-loss was unhealthy. 

"I'm extremely proud of the way I lost the weight," she told Us magazine, adding, "I did everything so naturally, and the athlete in me really came back."

But, she admitted in a separate interview with People magazine, "Maybe I was a little too enthusiastic in my training to get to the finale."

Frederickson said she maintained a 1,600-calorie daily diet and worked out six hours a day in the three months leading up to the finale. Producers also said she was carefully monitored throughout her seven-and-a-half months on the show, including in the days leading up to the final episode.

"Rachel passed all the required medical tests ensuring she was healthy," the show's executive producer, Dave Broome, told People.

And while Frederickson says she’s "very, very healthy," her trainer admits he was among those shocked by her transformation.

"The first thing that went through my mind was, 'That's just too much,'" Dolvett Quince said.