What's going on behind the scenes of the Adidas Adizero podium push over the last few years? That's what we ask Robbie Paterson, Senior Manager of Footwear Development in the Adizero Elite Racing line. We get all the details on how they almost had a 50 mm race shoe until World Athletics laid down the law, how much testing and development goes into an Adizero shoe, and everything that went into the Adidas Adizero Prime X 2 Strung.