And that's why the president has asked the entire government to step up, on his part. I mean, there's - there are things that the private sector needs to do; there are things that the government needs to do.

I joke that I stick with the job because it covers my insurance, but the reality is that my career has always been very important to me.

I feel fortunate as a woman to have a husband who loves me and shows me in every way.

I am not asking anyone to take the fun out of childhood. As we all know, treats are one of the best parts of being a kid. Instead, the goal here is to empower parents instead of undermining them as they try to make healthier choices for their families.

One of the things I've done personally is bring my girlfriends into my health and fitness journeys.

We have had with Barack Obama some just amazing experiences traveling abroad, being able to introduce our children to the world.... I'm also humbled by the response and the receptiveness, not just here in America, but around the world. There's a part of that warmth and enthusiasm and hope that is surprising and humbling.

One thing that I've learned from male role models is that they don't hesitate to invest in themselves, with the view that, if I'm healthy and happy, I'm going to be a better support to my spouse and children. And I've found that to be the case: Once my kids were settled, the next thing I did was take care of my own health and sanity. And made sure that I was exercising and felt good about myself. I'd bring that energy to everything else that I did, the career, relationship, on and on and on.