I've been to three Olympics and I don't feel I've ever quite achieved my best at any of them.

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

No one remembers who came fourth.

There's always going to be somebody who takes a dislike to you and you can't waste time worrying about it.

I actually got a nice surprise about being a mother because I expected it to be harder and to have to make more adaptations.

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.

It's totally different from last year because I came in with good shape with no health worries so it was about going out there and running well and enjoying it.