Iwan Gwyn Thomas is a Welsh sprinter who represented Great Britain and Northern Ireland at the Olympic Games in the 400 metres, and Wales at the Commonwealth Games. Thomas is a former European, Commonwealth Games and World 4 × 400 metres relay champion.
Jean Éric Milazar is a Mauritian athlete competing in the 200 metres and 400 metres. He was born in Rodrigues and currently resides in Coromandel, Mauritius. He is married to Natacha Ramen-Milazar since 2006 an ex volleyball player and together they have two kids Ericson and Erica.
Louis Jacobus van Zyl, better known as L. J. van Zyl, is a South African athlete competing in the 400 metre hurdles. He is the South African record holder in the event with a personal best of 47.66 seconds, which he achieved twice, three months apart. His time ranks him in the all-time top 25. He is a three-time African Champion in the event and competed for his country at the 2008, 2012 and 2016 Summer Olympics.
Martyn Joseph Rooney is an English sprinter who specialises in the 400 metres event. He reached the 400 m final at the 2008 Summer Olympics and won bronze in the 4×400 metres relay. A mainstay on the anchor leg of the Great Britain and England 4 x 400 metre relay teams, at the 2009 World Championships in Athletics he won a silver medal with the Great Britain relay team, and bronze in the 2015 and 2017 World Championships.
Amantle Montsho is a female sprinter from Botswana who specializes in the 400 metres. She represented her country at the 2004 and 2008 Summer Olympics, reaching the final at the latter edition. She was the first woman to represent Botswana at the Olympics. She has also competed at the World Championships in Athletics and the IAAF World Indoor Championships, and is the former World Champion over the 400m, winning in a personal best time of 49.56 in Daegu.
Ben Offereins is an Australian track and field athlete. He became national 400 m champion and also represented Australia internationally.
David "Dai" Greene is a Welsh retired hurdler who specialised in the 400 metres hurdles, competing internationally for both Wales and Great Britain, as well as Europe in the IAAF Intercontinental Cup.
Rose Tata-Muya is a retired runner from Kenya who specialised mainly in the 400m hurdles. She won medals at the continental level and competed at the Olympics, World Championships and Commonwealth Games.
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.
Jeshua Anderson is a retired American sprinter, who specializes in the 400 meter hurdles. He is a 3 time NCAA champion in the 400m hurdles and was the second freshman from Washington State University to ever win the NCAA title. In 2008 Anderson was 400 meter hurdles Junior World Champion and holds the second fastest high school time recorded in the 300m hurdles. He was born and raised in Woodland Hills, California and attended Taft High School. After winning the 2011 Outdoor Championships, Anderson had the competed for team USA at the world championships. He also participated in the 2016 Olympic trials in which he finished as a finalist.
Muizat Ajoke Odumosu Alademerin is a Nigerian track and field athlete who specialises in the 400 metres and the 400 metres hurdles. She represented Nigeria at the 2008 and 2012 Summer Olympics and competed at the World Championships in Athletics in 2007, 2009, 2011 and 2013. She was the bronze medallist at the 2007 All-Africa Games and went on to become the continental champion with a win at the 2008 and 2012 African Championships.
Steven Solomon is an Australian Olympic sprinter. He is a six-time defending Australian 400 metres champion.
Jack Green is a British sprint athlete who specialises in the 400m distance, along with the hurdles and the 4 × 400 m relay. He competed for the Great Britain team at the 2012 Summer Olympics in London and at the 2016 Summer Olympics in Rio de Janeiro.
Matthew Hudson-Smith is a British track and field sprinter who specialises in the 400 metres and is the 5th fastest athlete of all-time over the distance. As of September 2024 he is ranked as the number one 400m runner in the world and has won six British titles, five Diamond League events, two individual European titles, an individual Olympic silver medal, World Championships silver and bronze individual medals and an individual Commonwealth silver medal. He has also won a number of relay titles including an Olympic bronze medal, World Championships bronze medal, two European gold medals, one European silver medal, one European bronze medal and a Commonwealth Games gold medal. Hudson-Smith also holds the European and British 4x400m records (2:55.83) along with the GB Team who ran in the final of the men's 4x400m event in the Paris 2024 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.
Nicholas Kiplagat Bett was a Kenyan track and field athlete who competed in the 400 metres hurdles. His personal best for the event is 47.79 seconds. He was a world champion in the event, having won in 2015, and a two-time bronze medallist at the African Championships in Athletics. He died in a road accident in Kenya at the age of 28.
Sage Heather Walker is a Canadian athlete specializing in the 400 metres hurdles. Competing internationally for Canada, she is the reigning Pan American champion in the 400 m hurdles, having also won Pan American medals in 2015 and 2019 as part of Canada's relay team.
Yvette Julie Wray is a female former English pentathlete, hurdler and sprinter. Born in Scraptoft, Leicestershire, she competed for Great Britain at the Olympic Games in Moscow 1980. She also represented England at the Commonwealth Games in 1978 and 1982, winning two bronze medals.
Jacob Paul is a British hurdler who won the 400 metres hurdles event at the 2019 British Athletics Championships. He competed for England at the 2018 Commonwealth Games in Gold Coast, Australia.
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 won the silver medal at the 2024 Summer Olympics in 400 m hurdles event.
