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    Biggest Loser Winner Rachel Frederickson's Exercise Confession: I Took 3 or 4 Classes a Day

    Rachel Frederickson, Biggest Loser NBC

    The Biggest Loser's Rachel Frederickson has sparked a controversy after her dramatic weight loss.

    The slimmed-down reality star lost an astounding 155 pounds by the finale, weighing in at 105 pounds on her 5-foot 4-inch frame.

    So just how did Frederickson manage to shed more than half of her body weight in such a short amount of time?

    She revealed her fitness regimen during a media conference call with reporters (via Reality TV World) on Wednesday, saying "Well, when I'm walking, and I'm working on my treadmill, I work you know, kind of all day."

    She added, "And then, you know, I would take 3 to 4 classes a day and have fun with all the people in the room. It was pretty cool. I'd be in Zumbas and I'd be in spin class."

    NEWS: Rachel sounds off on her shocking transformation, insists she feels "amazing"

    Rachel Frederickson, Biggest Loser NBC

    The 24-year-old also admitted to eating 1,600 calories a day and is the "maintenance" stage.

    "I was very enthusiastic about the finale and I'm really excited about my life here going into maintenance mode," she reiterated. "I'm going to try new exercises and continue on this path and see where it takes me—finding that balance!"

    Frederickson explained that discipline, and the show's finale, gave her the extra motivation to stay on track throughout the strict program.

    "I have had support systems in place the entire time I was on The Biggest Loser. We are given a calorie budget and I stuck to that. I've done lots of working out and the finale was very enthusiastic," she said.

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    Rachel Frederickson, Biggest Loser NBC

    Frederickson's trainer, Dolvett Quince, broke his silence about the criticism surrounding his contestant via Twitter.

    "Biggest Loser is a journey which has its ups and downs. Please try not to look at one slice of Rachel's journey and come to broad conclusions. Rachel's health is and always has been my main concern and her journey to good health has not yet ended!!"

    (E! and The Biggest Loser are both part of the NBCUniversal family.)

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