I keep track of my body by how my jeans fit—and how I feel.

One of the things I like best about 'Biggest Loser' is being around people who are trying to make the right choices. When you feel defeated about your weight and your health, like there's no hope, and you still make the choice to fight for it, to make the change happen no matter what people say or think, that's inspiring to me.

Set reasonable goals; not something vague and unrealistic like "I want to be super-model skinny." I always had visions of very thin actresses in my mind when I was at the gym and it seemed so unattainable that I would quit any health regimen before it even got off the ground. But when I changed my mindset to focusing on making the healthiest choices possible for myself, it was a lot more realistic, more attainable, and then the results were visible.

My husband and I don't want Hollywood drama. I go to the market and do the dishes. I'm not treated differently because I work on TV.

Especially with me working in the entertainment industry, I think my kids are aware of weight and fat much earlier than other kids. It was important to me from the beginning to make sure they understand things like why too much sugar is bad for you, etc.

We talk a lot on 'Biggest Loser' about how fitness is a natural antidepressant, how it burns off stress. What I like about running is that it gives me time alone. I'm always busy, with people at work, with my kids. I love getting out for a run by myself and just listening to my music.

Fitness is not an option. It's part of my job.