Plenty of people who are 38 have run really well in the marathon.
A half marathon is a good way to have a bit of fun and race against those girls and learn a bit more about them. The world half marathon is a world championship at the end of the day and it's important. I've win it twice and it's a quality event.
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.
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'm not meek at all.
The biggest danger is trying to put too much pressure on yourself, trying to get in too good shape.
Never set limits, go after your dreams, don't be afraid to push the boundaries. And laugh a lot - it's good for you!
I just want to be in the best shape I can be. Not to stand on that start line and say: 'Oh my God, I have this injury and that injury.' I just want to be able to go out and race.
I try not to worry about things that I can't control.
I'm confident of what I have to achieve in the buildup to London 2012.
Actually I don't choose to expose myself in public. I choose to compete; the other side just comes with the package.
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.
You see, with me, when I'm nervous, I smile and laugh.
I've no desire to do one of those 50-mile races like the Comrades or anything like that.
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.