I find that after every win, there is a new surge in motivation because it feels so good. I am addicted to winning. That sounds terrible, but it is true you are addicted to that feeling.

I am a terrible sleeper.

Injuries aren't anything foreign to me. I am used to overcoming illness and injury; you can't complain about it. When you're standing up there on the blocks, it doesn't really matter: it's all about the next minute.

I am really addicted to music.

Every time I reach a major milestone in my career, I expect it to make more of a difference than it does, and I guess that means I'm in the sport for the right reasons. I'm not in it to win it because winning can only last for so long, and it's a very fickle thing, sport.

I am happiest when I don't know what's coming next.