Like some high official, you have to tell your brain: 'Do it. Come on. I have to do it.'

My father thought sport was something fun - he didn't know it was a way to make money. Then I won a Mercedes at the world championships and I gave it to him. From the moment it arrived my father said: 'Good, you can support not just yourself but me too'.

My father didn't think running was sensible. He told me running is just wasting time.

I used to run to school, 10k every day. And this at altitude, perfect preparation, really.

I wanted to experience New York, to look up and see buildings.

This hand is not very active always, because it was in this hand that I carried my books. My carrying hand was always my strongest. Now I think my other hand has developed more muscles from signing all those autographs.

Age for me is just a number.