In the week before a race, I try to stay away from germ areas. I keep disinfectant wipes in my bag for when I have to use a supermarket trolley or something like that.

The cheats always have a way of justifying their behaviour - everyone else is getting away with it, so why shouldn't I? But because they're so reliant on the drugs - and the drugs are not always perfect, you're not guaranteed to peak at a big event - they don't have the confidence to look in the mirror and know that they can go out and give their best. If you're clean and you've prepared well for a race, that's where you have an edge.

I have always run as hard as I can. You are not going to run any harder with or without men. You are running on your own two feet.

In my Olympic history I don't think I have achieved my potential as an athlete. That's what I want when I look back at my career. I want to be able to say I gave it my best shot.

I took a lot of bad things after Athens. I just learnt to deal with it. The problem was beforehand I had this feeling where I was trying to please everybody - I wanted everybody to like me.

Doing the long endurance stuff seems to have given me the strength to sustain the speed. I think my body is just a lot stronger (thanks to the marathon)... By increasing the long runs, I found that does not take anything away from the speed but increases the strength on the track.

I try not to worry about things that I can't control.