Watch us cut a $250 racing shoe in half for, you know, science.
. In other words, the Vaporfly’s success effectively changed the rules of running and Nike made out quite favorably.If competing shoe companies want their athletes running in a Vaporfly competitor come the 2020 Tokyo Olympics, they have until April 30 to release a shoe to the public; prototypes are no longer allowed.
To find out just what makes the Vaporfly so quick, we compared it against two other racing shoes that dominated the roads before Nike’s super-shoe arrived on the scene. Adidas’s Adizero Adios 3 Boost is very similar to the one Dennis Kimetto wore when he broke the marathon world record in 2014—it signifies the high water mark in shoe tech pre-Vaporfly.
At 40mm thick in the heel, the Nike ZoomX Vaporfly Next% is the upper limit of shoe thickness allowed under new World Athletics rules.We also analyzed the original New Balance 1400; the 2009 racing shoe used a lightweight EVA foam construction that was the de facto racing shoe formula before Adidas debuted Boost in 2013. Racing flats used to be all about lightness and responsiveness, so the 1400 stands in for the old school design.
The advantage of foam compounds like ZoomX and Boost is that they allow you to use less energy to maintain the same pace, thus allowing you to run faster over the course of a race. To illustrate the difference, we lined up the three shoes for a treadmill test. After a brief warmup period, to allow my heart rate to level off, I ran a 5:30 mile in each of the shoes.
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