Dustin Joubert on Instagram: “Advancements in running shoe technology, particularly in the Nike Vaporfly line, have been shown to improve running economy/performance…”
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Controversial Nike Vaporflys to escape ban but running shoe rules will tighten | Athletics | The Guardian
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Nike's Vaporfly 4% Shoes Really Did Boost the Running Economy of Everyone Tested, Says Study | Runner's World
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Nike Says Its $250 Running Shoes Will Make You Run Much Faster. What if That's Actually True? - The New York Times
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