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.
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.
The United States currently holds the pending world record in the men's DMR with a time of 9:15.50, set on May 3, 2015. This was set during the 2015 IAAF World Relays at Thomas Robinson Stadium, located in Nassau, Bahamas. The team consisted of Kyle Merber 2:53.56 (1200m), Brycen Spratling 45.95 (400m), Brandon Johnson 1:44.75 (800m), and Ben Blankenship 3:51.24 (1600m). They shaved off 0.06s from Kenya's previous world record time set in 2006.
The Kenyan team of 2006 ran the DMR in 9:15.56, currently the second fastest time ever run. At the time of the IAAF announcement of world record status, this mark became the ratified world record. Elkanah Angwenyi in 2:50.8 (1,200 meters), Thomas Musembi in 45.8 (400), Alfred Yego in 1:46.2 (800) and Alex Kipchirchir in 3:52.8 (1,600). This mark was set on April 29, 2006, at the Penn Relays in Philadelphia, Pennsylvania.
The United States team of Matthew Centrowitz Jr. in 2:49.47 (1,200 meters), Mike Berry in 46.40 (400), Erik Sowinski in 1:47.60 (800) and Pat Casey in 3:56.48 (1,600) currently hold the indoor world best in a time of 9:19.93. The mark was set on January 31, 2015 in New Balance Track & Field Center, New York City, New York.
At the same 2015 IAAF World Relays, the women's world record was set by the American team of Treniere Moser 3:18.38 (1200m), Sanya Richards-Ross (50.12) (400m), Ajee' Wilson 2:00.08 (800m), and Shannon Rowbury 4:27.92 (1600m) running 10:36.50. They beat the outdoor record of 10:48.38 set by a team from Villanova University of Kathy Franey (1200m), Michelle Bennett (400m), Celeste Halliday (800m), and Vicki Huber (1600m) at the Penn Relays in April 1988 in Philadelphia, Pennsylvania 27 years earlier.
The United States women's team of Sarah Brown, Mahagony Jones, Megan Krumpoch, and Brenda Martinez set the first indoor world record for the event with a time of 10:42.57 at New Balance Indoor Grand Prix in 2015. At the time of the IAAF announcement, this time, superior to the best time outdoors, became the ratified world record even though it was set on an indoor banked track.
This record was broken by the United States team with a time of 10:40.31, set at the New Balance Indoor Grand Prix on January 28, 2017. The team consisted of Olympic medalist Emma Coburn 3:18.40 (1,200m), Sydney McLaughlin 52.32 (400m), Brenda Martinez, member of the old record setting team, in 2:01.92 (800 m) and in addition Olympic medalist and former world 1,500m champion Jenny Simpson 4:27.66 (1600 m).
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- "Men's Distance Medley Relay Invitational Final". Armory.milesplit.com. 31 January 2015. Archived from the original on 1 February 2015. Retrieved 31 January 2015.
- Parker Morse (8 February 2015). "Willis mile win leads the string of indoor superlatives in Boston". IAAF. Retrieved 8 February 2015.
- "Coburn, McLaughlin, Martinez, Simpson Break DMR World Record". FloTrack.org. Retrieved 2017-01-29.
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