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Too much spring in their step? Nike running shoe under scrutiny after record marathon times – GeekWire
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An Exclusive, Behind-the-Scenes Look at How Nike Is Trying to Break the 2-Hour Marathon Barrier | Runner's World
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Eliud Kipchoge will wear Nike's controversial shoe for first time in an official race at the London Marathon | CTV News
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Eliud Kipchoge ran a world record in the Nike Alphafly 2 – Could he have run that fast in different running shoes? | T3
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