How to Build the World's Fastest Marathoner

Breaking the 2-hour marathon barrier — that is, running a marathon in less than 2 hours —

has long been seen as the holy grail of running, a feat that some people think could even be impossible. But, on May 6, 2017, three athletes will attempt to break the 2-hour barrier as part of Nike's Breaking2 project. The experiment will take place on the 63rd anniversary of another huge running milestone: when Roger Bannister became the first person to break the 4-minute mile, completing it in 3 minutes and 59.4 seconds. [Read more about Nike's "moonshot"marathon attempt] But what does it take to run the fastest marathon time in the world?                 https://www.livescience.com/58998-how-to-build-worlds-fastest-marathoner.html