"I just want to be the best I can be. And I'll do whatever it takes to be that. I could have been really comfortable where I was in Teddington, nice house, family, friends, watching the Arsenal. But if you want to win medals, then you have to do whatever is necessary. Every second counts. One, two per cent could make a difference. I went to the US to find those percentages. People say don't change when things are going well, I felt the opposite. And it's worked."