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

There are so many things that I still want to do. My foundation, growing my brand . . . the list is endless. I'm honestly busier now than I was when I was swimming. It's kind of weird, but I feel like more of an adult because I have to do stuff every day. Whether it's checking emails or making phone calls or doing this and that, it's fun for me. It's the start of a new chapter. At times, it is frustrating, but I know it's not going to be easy to accomplish the goals that I want.

You can't put a limit anything.

Before, it came easy for me. I don't have two speeds anymore. I need to focus on the small things that I once took for granted.

It's not how you start, but it's how you finish.

I don't have a strict diet. It's all about cramming in as many calories into my system as I possibly can. To be honest with you, I have a tough time keeping weight on.

[Phelps] firmly denies that he takes drugs, suggesting that the notorious photo of him smoking from a bong was a one-time lapse of judgment.