James WittsJames Witts has a background in sports science, and is a writer for a number of magazines, including Cyclist, 220 Triathlon, Runner's World, Men's Health and GQ. He writes for The Guardian, too, and has repored from numerous editions of the Tour de France. He's also an active endurance athlete, competing in triathlons, half-marathons and sportives around the world. Read More Read Less