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adidas Running on Twitter: "“You don't train every day to achieve what you know is in your reach. You train to achieve what is at the very edge of your limit”
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It stretches the limits of performance': the race to make the world's fastest running shoe | Running | The Guardian
RRW: "Women-Only" World Record Of 65:34 For Peres Jepchirchir At Prague 21.1 KM; Kibiwott Kandie Wins Men's Race In 58:37 - LetsRun.com
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