Road Trail Run: Vaporfly 4% Flyknit Initial Impressions and Race Review. Near Perfect for 1:07 & 1:40 Half Racer/Testers. Comparisons to the Original Vaporfly 4% and Zoom Fly Flyknit
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Running: Nike Vaporfly 4% trainers boost elite athletes' performance by up to 1.7%, study finds | Daily Mail Online
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IAAF steps up investigation into fears over springs in Nike running shoes | Athletics | The Guardian
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