The 400 metres hurdles is a track and field hurdling event. The event has been on the Olympic athletics programme since 1900 for men and since 1984 for women.
France competed at the 1992 Summer Olympics in Barcelona, Spain. 339 competitors, 241 men and 98 women, took part in 196 events in 25 sports.
Great Britain, represented by the British Olympic Association (BOA), competed at the 1996 Summer Olympics in Atlanta, United States. British athletes have competed in every single Summer Olympic Games. 300 competitors, 184 men and 116 women, took part in 175 events in 22 sports. The Atlanta games saw Great Britain's worst performance at a Summer Olympics since 1952, finishing in 36th position – below nations such as Belgium, Algeria and Kazakhstan – winning a single gold medal, and 15 medals overall.
Fabrizio Mori is an Italian hurdler, best known for his gold medal at the 1999 World Championships.
Sabine Busch is a retired East German athlete, who specialised in the 400 metres and the 400 metres hurdles. In 1987, she became the World Champion at 400 m hurdles and the World Indoor Champion at 400 m.
The Women's 400 metres Hurdles at the 1988 Summer Olympics in Seoul, South Korea had an entry list of 35 competitors, with five qualifying heats and two semifinals (16) before the final (8) took place on Wednesday September 28, 1988.
Margarita Anatolyevna Ponomaryova, also known as Margarita Khromova, was a hurdler from Russia, best known for setting the world record in the women's 400 metres hurdles in 1984 with 53.58 secs.
Zuzana Hejnová is a retired Czech athlete who specialised in the 400 metres hurdles. She won the silver medal in the event at the 2012 London Olympics. Hejnová is a two-time World Champion, having claimed titles at the 2013 and 2015 World Championships in Athletics. She won bronze at the 2012 European Championships and silver for the 400 metres at the 2017 European Indoor Championships.
Eilidh Doyle is a retired British track and field athlete. Originally running as Eilidh Child, she specialised in the 400 metres hurdles outdoors, and the 400 metres flat indoors, as well as the 4 x 400 metres relay on both surfaces. She represented Great Britain at the 2012 Olympic Games in London, and won an Olympic bronze medal in the 4 x 400 metres relay at the 2016 Games in Rio de Janeiro. Individually, she is the 2014 European Champion and a three-time Commonwealth silver medalist in the 400 metres hurdles.
Anna Vasylivna Ryzhykova, nee Yaroshchuk is a Ukrainian track and field athlete who specialises in the 400 metres hurdles. At the European Athletics Championships, she won silver medals in 2012 and 2018, and bronze in 2022. Ryzhykova placed fifth at the 2020 Tokyo Olympics.
Léa Sprunger is a former Swiss track and field athlete. Originally a heptathlete like her older sister Ellen, she began concentrating on the 200 metres and 400 metres in 2011, and then on the 400 metres hurdles from 2015. Her best times in the 400m and 400m hurdles of 50.52 s (2018) and 54.06 s (2019) are the Swiss records. She finished fifth in the 400m hurdles final at the 2017 World Championships, and went on to win the gold medal in the 400m hurdles at the 2018 European Championships.
Lina Marcela Flórez Valencia is a Colombian hurdler. At the 2012 Summer Olympics, she competed in the Women's 100 metres hurdles.
Yadisleidy Pedroso is an Italian hurdler. She competed at the 2020 Summer Olympics, in 400 m hurdles.
Dalilah Muhammad is an American track and field athlete who specializes in the 400 meters hurdles. She is the 2016 Rio Olympics champion and 2020 Tokyo Olympics silver medalist, becoming at the latter the then-second-fastest woman of all time in the event with her personal best of 51.58 seconds. Muhammad was second at both the 2013 and 2017 World Championships to take her first gold in 2019, setting the former world record of 52.16 s. She was the second female 400 m hurdler in history, after Sally Gunnell, to have won the Olympic, World titles and broken the world record. At both the 2019 World Championships and Tokyo Games, she also took gold as part of women's 4 × 400 metres relay team.
Selvagowry Retchakan-Müller, is an English former track and field athlete who competed in the 400 metres hurdles. She represented Great Britain at the 1992 Olympic Games in Barcelona, and won silver medals at the 1992 IAAF World Cup and the 1998 Commonwealth Games. She won five AAA Championships titles and two UK Championship titles. She was ranked in the world's top ten at 400 metres hurdles in both 1991 and 1992.
Janieve Russell is a Jamaican track and field athlete who competes mainly in the 400 metres hurdles and the 400 metres sprint. She won an Olympic bronze medal in the 4 × 400 m relay in Tokyo 2021, where she also finished fourth in the 400m hurdles final in a personal best of 53.08 secs. She is a four-time Commonwealth Games gold medallist, winning the 400m hurdles title in 2018 and 2022, and the 4 × 400 m relay in 2014 and 2018. She has also won two relay silvers at the World Championships and a relay gold at the World Indoor Championships.
Kendra "Keni" Harrison is an American hurdler. Harrison held the world record in the women's 100 metres hurdles with a time of 12.20 seconds, set on July 22, 2016 at the London Müller Anniversary Games, breaking the previous world record of 12.21 seconds achieved nearly 28 years earlier by Bulgarian athlete Yordanka Donkova.
Donna Koniel is an athlete from Papua New Guinea competing primarily in the 400 and 800 metres. She represented her country at the 2015 World Championships in Beijing without advancing from the first round.
Sanda Belgyan is a Romanian athlete specialising in the 400 metres and 400 metres hurdles. She competed in the 4 × 400 metres relay at the 2013 and 2015 World Championships reaching the final on the first occasion.
Anna Cockrell is an American track and field athlete competing in sprinting and hurdling. She is a two-time medalist at the 2019 Pan American Games in Lima, Peru and she represented the United States at the 2020 Summer Olympics in Tokyo, Japan.
Cameroon 
