Allyson Michelle Felix is a retired American track and field athlete who competed in the 100 meters, 200 meters and 400 meters. She specialized in the 200 meters from 2003 to 2013, then gradually shifted to the 400 meters later in her career. At 200 meters, Felix is the 2012 Olympic champion, a three-time world champion (2005–2009), a two-time Olympic silver medalist, and the 2011 world bronze medalist. At 400 meters, she is the 2015 world champion, 2011 world silver medalist, 2016 Olympic silver medalist, 2017 world bronze medalist, and 2020 Olympic bronze medalist. Across the short distances, Felix is a ten-time U.S. national champion.
Sanya Richards-Ross is a retired Jamaican-American track and field athlete, who competed internationally for the United States in the 400-meter sprint. Her notable accolades in this event include being the 2012 Olympic champion, 2009 world champion, 2008 Olympic bronze medalist, and 2005 world silver medalist. With her victory in 2012, she became the second American woman to win the 400 meters at the Olympic Games and the first American woman to earn multiple global 400-meter titles. At this distance, Richards-Ross is also a six-time U.S. national champion.
Brigitte Heike Meissner is a retired German athlete. She competed mainly in the 400 metres hurdles, but also spent two seasons specializing in the 800 metres. Notable achievements include a silver medal at the 2002 European Championships, medals in 4 x 400 metres relay at the 1994 European Championships and the 1997 World Indoor Championships and a fourth place at the 1995 World Championships.
Natalya Nikolayevna Antyukh is a Russian sprinter who specializes in the 400 metres and 400 metres hurdles. She won the bronze medal in the 400 metres and a silver for the 4 × 400 m relay at the 2004 Summer Olympics in Athens.
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.
Phara Anacharsis is a French athlete who specializes in the 400 metres and the 400 metres hurdles.
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.
Susana Aylen Clement Quezada is a Cuban track and field athlete, who specialized in the 400 metres. She won gold medals for the national relay team at the 2009 Central American and Caribbean Championships in Havana, and also, at the 2011 Pan American Games in Guadalajara, Mexico.
Precious Oluoma Nwoke Bichiri is a Nigerian track and field athlete, who specialized in the 400 metres. Nwoke competed for the women's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with her teammates Folashade Abugan, Joy Amechi Eze, and Muizat Ajoke Odumosu. She ran on the third leg of the second heat, with an individual-split time of 51.83 seconds. She and her team finished the relay in fourth place for a seasonal best time of 3:24.10, giving them a qualifying slot for the final round based on performance. By the following day, Nwoke and her team placed seventh in the finals, with another seasonal best time of 3:23.74.
Carline Muir is a Canadian sprinter, who specialized in the 400 metres. She won the bronze medal for the 400 metres, and ultimately, led her national team to claim the sprint relay title at the 2009 Summer Universiade in Belgrade, Serbia. She is also a three-time junior national champion, a two-time silver medalist at the Canadian Track and Field Championships.
Dimitra Dova is a Greek sprinter, who specialized in the 400 metres. She won the gold medal for her category at the 2005 Mediterranean Games in Almería, Spain, with a time of 52.67 seconds, defeating her compatriot Phara Anacharsis by three hundredths of a second (0.03).
Sayaka Aoki is a Japanese track and field sprinter and hurdler, who specializes in the 400 metres sprint and 400 metres hurdles. She competed for her country as part of the Japanese women's 4 × 400 metres relay team at the Summer Olympics in 2008 and the World Championships in Athletics three times. She has been a four-time medallist in the relay at the Asian Athletics Championships, including a gold medal in 2011. She won her first major international medal in the hurdles – a bronze – at the 2017 Asian Athletics Championships.
Josiane da Silva Tito is a Brazilian sprinter and middle-distance runner.
Maria Laura Almirão is a Brazilian sprinter, who specialized in the 400 metres. She is a two-time Olympian and a five-time medalist for the 400 metres and sprint relay at the Ibero-American Championships.
Pedro Juan Mejía Eusebio is a Dominican sprinter, who specialized in the 400 metres. He won two bronze medals, as a member of the Dominican Republic national team, in the men's 4 × 400 m relay at the 2007 Pan American Games in Rio de Janeiro, Brazil, and at the 2008 IAAF World Indoor Championships in Valencia, Spain.
Ruth del Carmen Grajeda González is a Mexican sprinter, who specialized in the 400 metres. She won two gold medals, as a member of the Mexican relay team, at the 2006 Ibero-American Championships in Ponce, Puerto Rico, and at the 2008 Ibero-American Championships in Iquique, Chile.
Nallely Vela Rascón is a Mexican sprinter, who specialized in the 400 metres. She won a total of three medals, as a member of the Mexican relay team, at the Ibero-American Championships.
Jonna Valesca Tilgner is a German sprinter and hurdler, who specialized in the 400 metres. She won two medals, silver and bronze, in the women's 400 m hurdles at the 2007 Summer Universiade in Bangkok, Thailand, and at the 2009 Summer Universiade in Belgrade, Serbia, clocking at 56.27 and 56.02 seconds, respectively. Tilgner is also a member of Bremer Leichtathletik Team, and is coached and trained by Jens Ellrott.
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.
Annett Horna is a German athlete who is best known as an 800 meter and 1500 meter runner for SV Halle.
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