I've always been good at putting things behind me–I fall apart, do my crying bit, and then put it away and move on.

Yeah, ideally, I'd probably wish to be more anonymous. But scrutiny and success go together. And I want to be successful.

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.

It's important that athletes can compete on a level playing field. And youngsters coming into the sport can know that if they are working hard and training hard, they'll see a true reflection of where they stand and what they can achieve worldwide and not be swayed by people who are cheating.

The biggest danger is trying to put too much pressure on yourself, trying to get in too good shape.

Every time I go out and race it's a goal to go out and run faster than I've done before.

An Olympic medal won't define my whole life, although it might look like it to onlookers. When I look back, I should have been able to get an Olympic medal.