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Nike's high-tech Vaporfly sneakers help athletes run 4 percent faster. Should they be banned for providing an unfair advantage? - Vox
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Eliud Kipchoge's footwear sparks debate as critics say the shoes give runners an 'unfair advantage' | Daily Mail Online
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Eliud Kipchoge denies platform Nike shoes violate the spirit of sport | London Marathon | The Guardian
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