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Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire
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Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
![Chicago Marathon on Twitter: "Did you even run the #ChicagoMarathon if you don't have the swag to prove it? Here is your official 2019 Chicago Marathon collection. Purchase it today at Nike Chicago Marathon on Twitter: "Did you even run the #ChicagoMarathon if you don't have the swag to prove it? Here is your official 2019 Chicago Marathon collection. Purchase it today at Nike](https://pbs.twimg.com/media/EE1X-mjWwAECgUr.jpg)
Chicago Marathon on Twitter: "Did you even run the #ChicagoMarathon if you don't have the swag to prove it? Here is your official 2019 Chicago Marathon collection. Purchase it today at Nike
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Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics | BBC Science Focus Magazine
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