Nike's controversial Vaporfly shoes are helping runners set new records, but some think it's 'technology doping.' Here's how they work. - Binge Post
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Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Sport | The Guardian
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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 and Adidas just rolled out ultra-fast marathon shoes. But do they make sense for the average runner?
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