The 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor running track, it is one lap around the track. Runners start in staggered positions and race in separate lanes for the entire course. In many countries, athletes previously competed in the 440-yard dash (402.336 m)—which is a quarter of a mile and was referred to as the "quarter-mile"—instead of the 400 m (437.445 yards), though this distance is now obsolete.
Yuriy Mikhailovich Borzakovskiy is a Russian middle-distance runner specializing in the 800 metres.
The World Athletics U20 Championships is a biennial world championships for the sport of athletics organised by the World Athletics, contested by athletes in the under-20 athletics age category (19 years old or younger on 31 December in the year of the competition.
Jennifer Brenda "Jenny" Meadows is a retired British athlete. Her main event was the 800 metres, although she previously competed also over the 400 metres. She won the bronze medal at the 2009 World Championships, and a silver at the 2010 World Indoor Championships. At the European Athletics Championships, Meadows took silver outdoors in 2010 and gold indoors in 2011. She also had some international success as part of the Great Britain women's 4 x 400 metres relay squad.
David Lekuta Rudisha, MBS is a Kenyan middle-distance runner who specialized in the 800 metres. He is a two-time back-to-back Olympic champion from the 2012 London and 2016 Rio Olympics, a two-time World champion from the 2011 and 2015 World Championships in Athletics, and a world record holder at the event with a time of 1:40.91, set at the 2012 London Games on 9 August 2012. Rudisha is the first and only person to ever run 800 metres under 1:41, and he holds the three fastest, six of the eight fastest, and half of the twenty fastest times ever run in this event.
Adam Piotr Kszczot is a retired Polish middle-distance runner who specialised in the 800 metres. His achievements include silver medals at the 2015 and 2017 World Championships in Athletics, gold at the 2018 World Indoor Championships as well as silver and bronze at the 2014 and 2010 World Indoor Championships respectively. Kszczot won three gold medals in the 800 m at both the European Outdoor and Indoor Championships. He twice competed at the Olympic Games, in 2012 and 2016, narrowly missing the final on both occasions.
Marcin Przemysław Lewandowski is a Polish retired middle-distance runner. He won the bronze medal in the 1500 metres at the 2019 World Athletics Championships and silver in the same event at the 2018 World Indoor Championships. At the European Athletics Championships, Lewandowski claimed gold in the 800 metres in 2010 and silvers in 2016 and 2018 for the 800 m and 1500 m respectively. He took also five medals at the European Indoor Championships, including three golds between 2015 and 2019, and two silvers in 2011 and 2021.
Jessica Warner-Judd is an English middle- and long-distance runner. She won two individual medals in the Under-20 and U23 races at the European Cross Country Championships and a gold medal for the 5000 metres at the 2019 Universiade.
Shaunae Miller-Uibo is a Bahamian track and field sprinter who competes in the 200 and 400 metres. She is a two-time Olympic champion after winning the women's 400 metres at the 2016 Rio Olympics and again at the 2020 Tokyo Olympics.
Nijel Carlos Amilfitano Amos is a Botswana middle-distance runner who competes in the 800 metres. He won the silver medal at the 2012 London Olympics, which was Botswana's first ever Olympic medal. Amos claimed gold medals at the 2014 Commonwealth Games and 2015 All-Africa Games. At the African Championships in Athletics, he took golds in 2014, 2016 and 2018.
Pierre-Ambroise Bosse is a retired French middle-distance runner. He won a gold medal in the 800 metres at the 2017 World Athletics Championship. Bosse set the French national record for the 800 m in 2014, with his time of 1.42.53.
Laura Muir is a Scottish middle- and long-distance runner. She is the 2020 Tokyo Olympic silver medallist in the 1500 metres, having previously finished seventh in the event at the 2016 Rio Olympics. Muir won the bronze medal at the 2022 World Championships, and has three other top five placings in 1500 m finals at the World Athletics Championships, finishing fifth in 2015, fourth in 2017 and fifth in 2019. She is a two-time European 1500 m champion from 2018 and 2022 as well as the 2022 Commonwealth Games 1500 m champion and 800 metres bronze medallist.
Jake Wightman is a British middle-distance runner who primarily competes in the 1500 metres. He won the gold medal at the 2022 World Championships, the first global gold in a middle distance event for a British male since Seb Coe's 1500 m title at the 1984 Los Angeles Olympics. At the European Athletics Championships, Wightman earned a bronze in 2018 and a silver for the 800 metres in 2022. He won bronze medals at the 2018 and 2022 Commonwealth Games.
Brandon McBride is a Canadian track and field athlete competing in middle-distance events, predominantly in the 800 metres. He won the gold medal in the event at the 2018 NACAC Championships.
Emmanuel Kipkurui Korir is a Kenyan middle-distance runner. He is the 2020 Tokyo Olympic and 2022 World champion in the 800 metres. Korir won the silver medal in the event at the 2018 African Championships in Athletics.
Marco Arop is a Canadian track and field athlete competing in the middle distance events. Arop is the reigning world champion in the 800 m, winning gold at the 2023 World Athletics Championship, after winning bronze the previous year at the 2022 World Athletics Championships. He was the first Canadian win a world championship in the 800 m. Arop was also the 2019 Pan American Games champion in 800 m. Arop represented Canada at the 2020 Summer Olympics and he currently holds a Canadian national record personal best of 1:42.85 in the 800 m.
The Jamaican Athletics Championships is an annual outdoor track and field competition organised by the Jamaica Athletics Administrative Association, which serves as the national championship for the sport in Jamaica.
Jemma Reekie is a Scottish middle-distance runner who competed at the 2020 Summer Olympics.
Isaiah Champion Jewett is an American middle-distance runner who specializes in the 800 metres. He finished second in the event at the NACAC U23 Championships in 2019, and he won a national title at the 2021 NCAA Outdoor Championships while competing for the University of Southern California. Jewett represented the United States at the 2020 Summer Olympics.
Cătălin Tecuceanu, commonly spelled Catalin Tecuceanu, is a Romanian-born Italian middle-distance runner.
