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.

I have reached a place in my life where I need to sit down and say, 'Well, what do I do? What's best for me?' I need to look into options for the future.

If you want to be the best, you have to do things that other people aren't willing to do.

I want to test my maximum and see how much I can do. And I want to change the world of swimming.

I want to be able to look back and say, 'I've done everything I can, and I was successful.' I don't want to look back and say I should have done this or that. I'd like to change things for the younger generation of swimmers coming along.