On the £20,000 Mercedes prizes for each winner at the World Athletics Championships in Stuttgart- Anyone good enough to win already has one.

All my life I believed I became an athlete through my own determination, but it's impossible to think that being descended from slaves hasn't left an imprint through the generations.

Protect your good image from the eyes of negative viewers, who may look at your good appearance with an ugly fiendish eye, and ruin your positive qualities with their chemical infested tongues.

One of the main techniques I used was focusing on the goal and visualising myself competing in the race before the race started.

A good mentor offers directions and driving tips from the back seat. You still have to drive the car.

I've had to learn that not everybody does things my way. But I do expect the absolute best of everyone around me, and I'm disappointed when people don't expect that of themselves.

Difficult as it was to hear, slavery has benefited descendants like me - I believe there is a superior athletic gene in us.