How Eliud Kipchoge Pulled Off His Epic, Sub-2-Hour Marathon | WIRED

How Eliud Kipchoge Pulled Off His Epic, Sub-2-Hour Marathon | WIRED: In the video above, we put that question to physiologist Michael Joyner, a renowned expert in human performance who in 1991 hypothesized that a two-hour marathon was possible. In our interview, we discuss all the factors that came together to produce Kipchoge's historic time—and what it might take to see the two-hour barrier fall in open competition.