![World champion sprinter Tyson Gay demonstrates his starting block techniques during the Adidas running camp at the Athletes' Performance Institute in Carson, Calif., Wednesday, March 18, 2009. Gay suffered a knee injury World champion sprinter Tyson Gay demonstrates his starting block techniques during the Adidas running camp at the Athletes' Performance Institute in Carson, Calif., Wednesday, March 18, 2009. Gay suffered a knee injury](https://c8.alamy.com/comp/2P8PG0E/world-champion-sprinter-tyson-gay-demonstrates-his-starting-block-techniques-during-the-adidas-running-camp-at-the-athletes-performance-institute-in-carson-calif-wednesday-march-18-2009-gay-suffered-a-knee-injury-during-the-offseason-that-cost-him-about-six-weeks-of-training-and-with-the-2009-season-about-to-begin-he-hasnt-yet-set-his-schedule-ap-photodamian-dovarganes-2P8PG0E.jpg)
World champion sprinter Tyson Gay demonstrates his starting block techniques during the Adidas running camp at the Athletes' Performance Institute in Carson, Calif., Wednesday, March 18, 2009. Gay suffered a knee injury
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Photos - Promo Posters - Tyson Gay - adidas - Because I don't run, I race - US Championships eugene 2009
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