You have to know your body. It's part of the beauty of the training process, and once you've determined how much your body and mind can take, you can then begin to reach your potential.

My goal is to break three hours in a marathon

Yes, winning the gold medal was undoubtedly the biggest day of my career - mostly because I won the way I had prepared to run it. It was a totally satisfying experience.

The irony of that is, what makes it kind of ironic, is when you do become successful as a professional athlete in particular, a lot of the young children who are emulating these stars do have a different perspective.

You train best where you are the happiest.

There's obviously some validity to it. But I think it also points out that you obviously can do it on your own because people have been doing it long before they had the stuff.

I admire runners older than I - they are now my heroes. I want to be like them as I grow older.