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

Sports physiologist Michael Joyner breaks down what it takes to run a marathon in less than two hours—and how it could happen again.

How Eliud Kipchoge Pulled Off His Epic, Sub-2-Hour Marathon
Sports physiologist Michael Joyner breaks down what it takes to run a marathon in less than two hours—and how it could happen again.