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.

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

I have been doing 120 miles a week, when normally I would do about 140.

I can't imagine living and not running.