Swimming is great because there are levels of goals. First, when I was four, it was making it to the other end and overcoming the fear of standing up in front of everybody at a swim meet because I was such a shy kid.

You can't go wrong with some nuts. The key word is 'some.' Eat them one at a time, not by the handful.

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.

Tennis is interesting because the women are almost more popular than the men. In the U.S. Open, women even get exactly the same money as the men.

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.

When I was training for the Olympics, I didn't eat the way I should have. I missed out on much-needed protein and opted for every easy carb.

The more sleep you get in before the clock turns midnight, the more rested you feel no matter what time your alarm goes off.