I think the sport needs the help to continue to motivate athletes.

I play football every Tuesday and Thursday early in the season. I am smart enough at the game. I score a lot of goals. I wouldn't be the best in the world but I am OK.

I had thought that I would stop in 2017, but my coach has told me to stop saying that as I may continue into 2018. I'm not thinking about it at the moment.

I can still improve a lot, but there is definitely a limit to what the human body can do.

Surprisingly, maybe the place I get recognised the least is the United States. America is not so big on track and field. Some recognise me there but lots don't.

I have to show who I am, play with the crowd, play with the camera. When people come to a race, part of it is the anticipation, "What is he going to do?"

Track and field was very big when I was growing up.