Actually I don't choose to expose myself in public. I choose to compete; the other side just comes with the package.

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.

I was glad I did a year abroad, because it helped me as an athlete and as a person. That took me out of my comfort zone. Watching the French athletes train in the Pyrenees made me realise what I had to do to become a top athlete.

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.

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

I set myself some specific goals, but the key one is just getting myself into as good a shape as possible for one day this year: the Olympic marathon.

We, as athletes, have our suspicions about who's cheating, but I'm not convinced that the testing has yet caught up with what people are using or what they are using to disguise it.