An engineer runs over a surface with high speed cameras to test an Adidas running shoe at the Adidas innovation laboratory in Herzogenaurach May 7, 2012. U.S. market leader Nike and German
An engineer adjusts test marks on an Adidas running shoe at the Adidas innovation laboratory in Herzogenaurach May 7, 2012. U.S. market leader Nike and German rival Adidas are locked in their