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distance medley relay
The distance medley relay (DMR) is an athletic event in which four athletes compete as part of a relay. With its inclusion in the IAAF World Relays program, the IAAF announced on May 1, 2015 that the event would be an official world record event.〔http://www.iaaf.org/news/press-release/world-relays-2015-prize-money〕
Unlike most track relays, each member of the team runs a different distance. A distance medley relay is made up of a 1200 meter leg (three laps on a standard 400 meter track), a 400 meter leg (one lap), an 800 meter leg (two laps), and a 1600 meter leg (four laps) in that order. The total distance run is 4000 meters, or nearly 2.5 miles. Aside from the 400 meter segment, which is a sprint, all legs are a middle distance run. Prior to going metric, the distance medley relay consisted of a 440 yard leg, an 880 yard leg, a 1320 yard leg and a one mile leg. The total distance for the old distance medley relay was 4400 yards and the total distance for the current metric distance medley relay is 4374.45 yards - slightly over 25 yards shorter than the old race.
== World best ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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