I was at the Olympic Games winning medals and I still doubted my image. I doubted what I looked like. That's sad.

I set my phone with motivational quotes to go off on random days and times. Like, 'You're stronger than you think you are.' I'll forget about it, then one will pop up and it'll give me a little boost.

To finish off this whole Olympics by finally getting the gold medal, it's the best feeling in the world.

It might have been easier to retire, to say my knee couldn't handle it and let that be that. At the same time, the prospect of not being able to compete in gymnastics anymore was heartbreaking.

My coach, Liang Chow, had one rule while I was training for the 2008 Olympics: no skiing. I could do anything I wanted outside the gym, he said, except ski.

People put too much emphasis on looks.

To have any doubt in your body is the biggest weakness an athlete can have.