Rebecca Romijn: Losing The Baby Weight Was "The Hardest Thing I've Ever Done"

Hot mama Rebecca Romijn sizzles on the March cover of Fitness magazine, showing off her svelte post-twins body. The 39-year-old model-turned-actress opens up about struggling to drop the more than 60 pounds she gained while carrying daughters Dolly and Charlie, now 3.

On losing the weight after the twins: "Losing that weight was probably the hardest thing I've ever done in my life. I had to change the way I worked out, the way I ate -- everything. Everything I did before I got pregnant -- like Pilates, which I had done for about 14 years -- didn't work anymore. I had to find a completely different way to challenge my body. A friend suggested I try Bikram yoga. At first the idea of doing a 90-minute workout in a 105-degree room sounded like torture. But the sweating is exactly what I became addicted to. My body changed dramatically almost immediately. Within three classes I noticed less belly fat. My knees and legs are stronger than ever now; my arms have definition for the first time in my life; and my posture is much, much better. I also feel completely energized from all of the deep breathing. I leave class relieved of any anxiety I went in with, and the sweating and detoxifying make my skin feel great. I can't recommend it enough."

On a typical workout week: "I do Bikram three days a week, and I run after my twins every day -- a workout in itself! I was doing yoga five days a week, but then I started to realize that my body was fatigued and my back was hurting. I think it's important to listen to your body and know when you're overdoing it."

On mommy guilt: "That's been a huge challenge since I became a mom. Mother's guilt is no joke! I feel it every time I leave them to go exercise. Now that the girls are in preschool, it's easier. I go as soon as I drop them off at school. As a mom it's very important to take care of yourself physically and mentally. You're no good to anyone unless you do. There are days when I rush out to a yoga class just as I'm starting to feel like I might be losing my mind."

Continue reading the interview with Rebecca at Fitness...