We wanted to see how close we could get to the world record. We'll take that for right now.

I'm fortunate to have an amazing, strong mother who is so supportive of everything me and my sisters did growing up - but she was someone who never forced us to go swim or to go do this or that. She helped us think about certain consequences when we needed to, but we made our own decisions. I think if I were forced to swim, I wouldn't have stayed in the pool as long as I did.

If I didn't swim my best, I'd think about it at school, at dinner, with my friends. It would drive me crazy.

Other nights ... I visualize to the point that I know exactly what I want to do: dive, glide, stroke, flip, reach the wall, hit the split time to the hundredth, then swim back again for as many times as I need to finish the race.

Why is it such a big deal what I'm swimming?

This is my 20th year in the sport. I've known swimming and that's it. I don't want to swim past age 30; if I continue after this Olympics, and come back in 2016, I'll be 31. I'm looking forward to being able to see the other side of the fence.

Even in high school, I'd tell my mom I was sick of swimming and wanted to try to play golf. She wasn't too happy. She'd say, 'Think about this.' And I'd always end up getting back in the pool.