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American track star Allyson Felix launches her own shoe company two years after leaving Nike - CBSSports.com
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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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World Athletics denies tipping off Nike over new running-shoe regulations | Athletics | The Guardian
What happens if an athlete is sponsored by Nike but decides to wear Adidas or other sports branded clothing/shoes? - Quora
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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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Nike stirs the pot with 'gamechanger' running shoe in step with new rules | Athletics | The Guardian
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