iPods and headphones were taken out of official races by USA Track and Field, the national governing body for running. They argued that highly competitive runners do not prefer to listen to music as they want to listen to their own body, competitors, and the audience. They greeted the ban on iPhones and headphones cheerfully. The intent of the ban is to help the runners concentrate on the race and not on music. It also intends to prevent some from having a competitive advantage.