As distances increase in track, so does the need for planning and running strategy. In sprint races up to 400 meters, speed and form are the main concerns. Although it's something of an oxymoron, the .
âIf you tell me I can& do something, I want to prove you wrong.â â Olympic Sprinter Allyson Felix. Start learning with the NTC Accelerator workout, inspired by her training, in the Nike+ Training Club App.