But if kids take up things like hockey and football they will go back to it.

I've still got a small fitness and conditioning business where I travel round the world doing stuff for individuals and corporations, mainly fitness training.

I'm competitive - that's what defines me - and I love it.

Having the ambition of becoming Olympic champion is a whole different ambition from wanting to be the greatest.

I didn't even know what it was when I started. But I was lucky. I found it at 16. Most people don't discover decathlon until they're 21 or 22.

We crave instant success these days. If you are a really good sprinter and long jumper, you don't want to spend two or three years on a whole new set of events. You're used to doing well and it's difficult to give that up.

If you don't want to grow old, then slow down the slowing down process.