Viktor Fyodorovich Markin is a former Soviet athlete, winner of two gold medals at the 1980 Summer Olympics.
Antonio McKay Sr. is a former track and field athlete who specialized in the 400 meters.
Du'aine Ladejo is an English-born athlete and television personality. In his sports career, he was best known for winning the 400 metres sprint gold medal at the 1994 European Championships and being a member of the United Kingdom and England 400-metre relay squads at the European Championships, Olympics and Commonwealth Games during the 1990s. Ladejo is of mainly Nigerian ancestry
Christine Ijeoma Ohuruogu, MBE is a British former track and field athlete who specialised in the 400 metres, the event for which she is an Olympic, World and Commonwealth champion. The Olympic champion in 2008, and silver medalist in 2012, she is a double World Champion, having won the 400 m at the 2007 and 2013 World Championships. She has also won six World championship medals in the women's 4 × 400 m relay as part of the Great Britain and Northern Ireland team and bronze Olympic medals in the women's 4 × 400 m relay at the 2008 Beijing Games and the 2016 Rio Games, her final Olympics. Ohuruogu shares with Merlene Ottey and Usain Bolt the record for medalling in most successive global championships – 9 – between the 2005 World Championships in Athletics and the 2016 Summer Olympics.
John Paul Lyndon Regis, MBE is a British former sprinter. During his career, he won gold medals in the 200 metres at the 1989 World Indoor Championships and the 1990 European Championships, and a silver medal in the distance at the 1993 World Championships.
LaShawn Merritt is a retired American track and field athlete who competed in sprinting events, specializing in the 400 metres. He is a former Olympic champion over the distance and his personal best of 43.65 seconds makes him the eleventh fastest of all time.
Rabah Mahhamed Yousif Bkheit is a Sudanese-born British track and field athlete, who initially competed for Sudan before obtaining British citizenship.
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.
Evan George O'Hanlon, is an Australian Paralympic athlete, who competes mainly in category T38 sprint events. He has won five gold medals at two Paralympic Games – 2008 Beijing and 2012 London. He also represented Australia at the 2016 Rio Paralympics and 2020 Tokyo Paralympics, winning a silver medal and a bronze medal respectively. In winning the bronze medal in the Men's 100m T38 at the 2019 World Para Athletics Championships in Dubai, O'Hanlon became Australia's most successful male athlete with a disability. His bronze medal took him to 12 medals in five world championships – one more than four-time Paralympian Neil Fuller.
Tristan Thomas is an Australian track and field athlete specialising in the 400 metres hurdles.
Anyika Onuora is a British retired sprint track and field athlete who competed in the 100 metres, 200 metres and 400 metres, and also the 4×100 metres relay and 4x400 metres relay.
David Kitur is a retired Kenyan runner, who specialised in 400 metres.
Francesco Friedrich is a German bobsledder who has been active since 2006. At the 2018 Winter Olympics in Pyeongchang, South Korea, he and his brakeman Thorsten Margis tied with Canada's Justin Kripps and Alexander Kopacz for the gold medal in the two-man competition. Friedrich also won gold outright in the four-man event alongside Margis, Candy Bauer and Martin Grothkopp, making Friedrich the fifth German pilot to win two-man and four-man golds at the same Games, after Andreas Ostler in 1952, Meinhard Nehmer in 1976, Wolfgang Hoppe in 1984 and André Lange in 2006. At the 2022 Winter Olympics in Beijing, China, Friedrich and Margis again won the gold medal with both sleighs. Friedrich previously competed at the 2014 Winter Olympics in the doubles and fours and finished in eighth and tenth place, respectively.
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.
Emily Diamond is a British track and field athlete, who competes in the 200 metres and 400 metres. Diamond came to prominence in her breakout season of 2016 when, following her first win at the British Championships over the 400 metres distance, she collected a gold medal in the 4 x 400 metres relay at the 2016 European Athletics Championships as part of the Great Britain team, followed by a bronze in the same discipline at the 2016 Summer Olympics.
Lisanne de Witte is a Dutch track and field athlete who competes in sprinting. She specialises in the 400 metres, where she held the Dutch record with her personal best time of 50.77 seconds from 2018 to 2021.
Yasmani Copello Escobar is a Cuban-born track and field hurdler who represents Turkey internationally. His personal best for the 400 metres hurdles is 47.81 seconds, set in the final of the 2018 European Athletics Championships in Berlin.
Wayde van Niekerk is a South African track and field sprinter who competes in the 200 and 400 metres. In the 400 metres, he is the current world and Olympic record holder, having set the record when he won the event at the 2016 Olympics.
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.
Abderrahman Almoubarrake Samba Alsaleck is a Qatari male track and field athlete who specialises in the 400 metres hurdles. He was born and raised in Saudi Arabia but chose to represent Mauritania – his father's homeland – before eventually switching allegiance to Qatar and moving to Doha in 2015. He became eligible to compete for his adopted country in May 2016. He was the second person to run the 400m hurdle event in less than 47 seconds.
