Welcome to Riding Nerdy, TNW’s fortnightly dive into bicycle-based tech, where we go into too much detail and geek out on all things related to pedal-powered gadgets. Eliud Kipchoge last year became the first athlete to run a marathon in under two hours after much training and careful preparation. Regardless of whether you’re aiming for a new world record or you just want to achieve a respectable time for your age, if you’re training for a marathon you might well want to know what you’re on course to accomplish. There are so many different equations claiming to predict marathon performance. But… This story continues at The Next Web

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