This time, Dr. Tim Podlogar and Alex Rhodes were joined by sports nutritionist Dr. Jean Paul Perret, who has been working with elite cyclists for the last few years to monitor their nutrition. 

They were talking about caffeine, one of the most commonly used supplements in the world of endurance sports. It is used by recreational athletes and professionals alike for the same reasons. Caffeine improves performance, while coffee, where it is most commonly found, also introduces a social element to training.