and chrissie wellington is here with me now. thank you so much for joining us. i love watching the images of you. it is quite a moniker to be one of the best endurance athletes. one thing you talked about, training your brain. it is mental as much as physical, what do you mean by that? >> yeah, i firmly believe, to be a good athlete, professional or otherwise, you have to be physically strong, but mentally strong. you have to have a mind that is able to overcome the down times, the hard times and the discomfort. and i believe that there are tools and strategies that you can use as an athlete. and that you can actually develop. so whether it is visualization or having family and friends or pizza at the finish line, you really have to have a positive mental outlook. and that has helped me to become a champion. >> i find there is a point at the race for everybody, you just don't think you can dig any deeper. that is where the mental kicks in. a lot of people said this seems like a fringe sport, a dangerous sport, potentially. you say it is probably safer than a lot