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IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
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Nike's controversial Vaporfly shoe that set records with 'built in secret weapon' might be banned - YouTube
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World Athletics Announces New Shoe Rules; Nike Alphaflys Are Banned But Vaporflys and Next% Are Ok - LetsRun.com
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Technological doping: The science of why Nike Alphaflys were banned from the Tokyo Olympics | BBC Science Focus Magazine
Nike Vaporfly: Record-setting running shoe could avoid IAAF competition ban, report says | Fox Business
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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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