Biggest Loser Winner Rachel Frederickson Says She Worked Out for Six Hours a Day

The updates on The Biggest Loser winner Rachel Frederickson—and her shocking 150-pound weight loss—just keep coming. The latest is from Frederickson herself, who recently told People that she limited her diet to 1,600 calories a day and spent six hours daily working out in the three months prior to the show's finale. "Maybe I was a little too enthusiastic in my training to get to the finale," she told People. 

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We checked in with Keri Glassman, M.S., R.D., a member of Women's Health's advisory board and a judge on Cook Your Ass Off, to find out how working out for a whopping six hours a day can affect your body.

"1,600 calories a day is what many people need just for their bodies to function normally," says Glassman. By working out for six hours a day, Frederickson was burning anywhere from 1,000 to 3,600 calories, depending on what type of exercises she was doing. When you have a deficit that big, it's likely impairing everything from cognitive function to immune function to bone strength, says Glassman. And while some athletes may work out six hours a day, they're also making sure to use proper form and refuel properly so as to stay healthy while maintaining such a demanding physical routine. "If you’re not being monitored perfectly, you could definitely be putting yourself at risk for injury," says Glassman.

For more info on how to drop pounds in a healthy way, visit our weight-loss channel.

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