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Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire
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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 denies platform Nike shoes violate the spirit of sport | London Marathon | The Guardian
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Eliud Kipchoge: How Nike and rabbit pacers helped a Kenyan break the 2-hour marathon barrier in Vienna - The Washington Post
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It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian
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