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.
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 retired Kenyan middle-distance runner who is the world and Olympic record holder in the 800 metres. Rudisha won gold medals in the 800 m at the 2012 London and 2016 Rio Olympic Games, where, at the former, he set the world record in the event with a time of 1:40.91. He is also a two-time World champion and two-time Diamond League champion in the 800 m. Rudisha is the first and only person to ever run 800 m under 1:41, and he holds the three fastest times ever run in this event, each being a world record when set.
Rabah Mahhamed Yousif Bkheit is a Sudanese-born British track and field athlete, who initially competed for Sudan before obtaining British citizenship.
Matteo Galvan is an Italian athlete who specializes in the 200 and 400 metres. His career highlight so far is the 2009 European Indoor Championships, where he placed sixth in the 400 metres and won a gold medal in the relay.
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.
Alysia Montaño is an American middle distance runner. She is a six-time USA Outdoor Track and Field Championships 800 metres champion. She gained significant publicity for the 2014 race that she competed while 8 months pregnant.
Dmitriy Anatolyevich Bogdanov is a Russian middle-distance runner who specializes in the 800 metres. His personal best times are 1:44.33 minutes in the 800 metres and 46.50 seconds in the 400 metres.
Yousef Ahmed Masrahi is a Saudi Arabian track and field athlete, who specialises in the 400 metres sprint. His personal best time for the event is 43.93 seconds, set in 2015, and is the Asian record.
The 16th IAAF World Indoor Championships in Athletics were held between March 17 and 20, 2016 in Portland, Oregon, United States.
Liemarvin Bonevacia is a Dutch sprinter specialising in the 400 metres. He won bronze medals in the event at the 2016 and 2024 European Athletics Championships, and the 2017 and 2021 European Indoor Championships. Bonevacia also earned five major medals for the 4 × 400 m relays, either men's or mixed, including silver medal in the men's relay at the 2020 Tokyo Olympics.
The 17th IAAF World Indoor Championships was held from 1 to 4 March 2018 in Birmingham, United Kingdom. This was the city's second hosting of the event as it previously did so in 2003.
Erik Sowinski is an American middle-distance runner, who specializes in the 800 metres. He won a bronze medal in the event at the 2016 World Indoor Championships, and he is a three-time national champion. He also formerly held the American indoor record in the 600 meters. Sowinski has garnered recognition for pacing other athletes to fast times, often in high-profile competitions.
Rafał Omelko is a retired Polish athlete who specialised in the 400 metres. He won two medals in the 4 × 400 metres relay at the European Athletics Championships.
Jakub Krzewina is a Polish track and field sprinter who specialises in the 400 metres. A frequent competitor for Poland in the 4×400 metres relay, he has won two medals at the European Athletics Championships and reached the final at the 2016 Summer Olympics. He was also a relay silver medallist with Europe at the 2014 IAAF Continental Cup.
Łukasz Krawczuk is a Polish sprinter specialising in the 400 metres. He has won two medals in the 4 × 400 metres relay at the European Athletics Championships.
Dylan Borlée is a Belgian sprinter who competes in the 400 metres. He is a member of the Borlée family.
Tony van Diepen is a Dutch track and field athlete competing in the 400 and 800 metres. He won the bronze medal in the 400 m at the 2019 European Indoor Championships and silver at the 2021 European Indoor Championships. Van Diepen earned five medals with Dutch 4 × 400 m relays, either men's or mixed, at major championships, including silver for the men's relay at the 2020 Tokyo Olympics.
