Sir Chris Hoy is Britain's greatest ever Olympian, winning six gold and one silver medal at four Olympic Games. His amazing journey took him from a cycling club in Edinburgh to the biggest sporting stages in the world. But he doesn't believe that he was simply born to be a champion. So how did he do it? And how does his story compare with the other top athletes he meets in this revealing film? With Andy Murray, Lennox Lewis, Sir Steve Redgrave, Rebecca Adlington and Graeme Obree.