The 1000 metres,1 kilometer run, or 1Krun is an uncommon middle-distance running event in track and field competitions. It consists of two and a half laps around an outdoor 400 m track, or five laps around an indoor 200 m track.
The 1000 yards, an imperial alternative, was sometimes also contested.[1][2]
^Joe D. Willis and Richard G. Wettan (November 2, 1975). "L. E. Myers, "World's Greatest Runner""(PDF). Journal of Sport History. 2 (2): 93. Archived from the original(PDF) on April 19, 2011. Retrieved October 26, 2011.