Today's guest editor, Sebastian Coe, owed much of his success to the pioneering scientific coaching methods of his late father, Peter.

Peter Coe's ideas crossed over into other sports; in horse racing, they brought so much success for the National Hunt trainer, Martin Pipe, it led to unfounded suspicion that he was guilty of blood-doping his horses.

As our sports presenter Rob Bonnet reports, some successful horse trainers continue to shun science and trust their instinct.

This is an extended version of the broadcast interview.

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