The Tour de France is the subject of this week's summer special as we look into the science and engineering of professional road bikes, training the human physique to endure thousands of kilometres on the saddle and eating the right food to keep you on the road. We also go out along some of the stages of the tour, meet a professional sprinter, find out why fans travel thousands of miles to see their cycling heroes in action and meet the doctors, mechanics, and organisers that turn the Tour de France into the well oiled machine that it is! Like this podcast? Please help us by supporting the Naked Scientists