At the end of a marathon, it's going to hurt whether you're speeding up or slowing down. You may as well push.

The kids know what I'm doing when I exercise, and that's powerful. So don't just tell your kids to go play outside. Take a moment off your computer, put on your tennis shoes, hop outside and help them start their game and run off some energy.

Protein is important and hard for me to get in a hurry. We're busy. I don't always remember to thaw the chicken for dinner. I always have eggs, and they're light and satisfying. I never feel stuffed at the end of it.

The first mile is mental. The rest are all heart.

I love to run, but training can be hard, especially with a family and a crazy travel schedule. I often do sprints with my kids, where they bike and I run along side them so we can 'race' each other for a quarter-mile or shorter repeats.

I enjoyed every bit of my swimming career. I think that's the most important advice - to enjoy what you do

It's not really about the competition. Your biggest challenge in a race is yourself. You're often racing against time. You're frequently running everything through your mind. You're always competing against preconceived ideas. It's not really the person next to you that you worry about.