Nike’s controversial Vaporfly shoes are making runners faster — so runners sponsored by other brands are blacking them out to wear in secret

Screen Shot 2020-08-16 at 3.02.02 PM.png

Vaporflys (and prototypes of them) have been involved in nearly every major running victory and milestone since 2016, and for good reason: Research suggests the design of their soles gives runners at least 4% more energetic efficiency over shoes from competing brands.

“The runner runs the race, but the shoe enables him or her to run it faster for the same effort or ability,” Geoff Burns, a kinesiology researcher and pro runner, told Business Insider of Vaporflys. “So for two athletes of equal ability on race day, the one with the shoes is going to beat the one without the shoes.”

That has led some athletes sponsored by companies other than Nike to don Vaporflys in secret. In at least three competitions, non-Nike runners have worn “blacked-out” Vaporflys: shoes covered in black permanent marker to make it difficult to spot the Nike swoosh.

Source: Yahoo