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.
Liu Xiang is a Chinese former 110 meter hurdler. Liu is an Olympic Gold medalist and World Champion. His 2004 Olympic gold medal was the first in a men's track and field event for China.
Samuel Matete is a retired male track and field athlete from Zambia, who competed mainly in 400 metres hurdles.
The 110 metres hurdles, or 110-metre hurdles, is a hurdling track and field event for men. It is included in the athletics programme at the Summer Olympic Games. The female counterpart is the 100 metres hurdles. As part of a racing event, ten hurdles of 42 inches (106.7 cm) in height are evenly spaced along a straight course of 110 metres. They are positioned so that they will fall over if bumped into by the runner. Fallen hurdles do not carry a fixed time penalty for the runners, but they have a significant pull-over weight which slows down the run. Like the 100 metres sprint, the 110 metres hurdles begins in the starting blocks.
The 100 metres hurdles, or 100-meter hurdles, is a track and field event run mainly by women. For the race, ten hurdles of a height of 33 inches (83.8 cm) are placed along a straight course of 100 metres (109.36 yd). The first hurdle is placed after a run-up of 13 metres from the starting line. The next 9 hurdles are set at a distance of 8.5 metres from each other, and the home stretch from the last hurdle to the finish line is 10.5 metres long. The hurdles are set up so that they will fall over if bumped into by the runner, but weighted so this is disadvantageous. Fallen hurdles do not count against runners provided that they do not run into them on purpose. Like the 100 metres sprint, the 100 m hurdles begins with athletes in starting blocks.
Melaine Walker O.D is a Jamaican 400 metres hurdler. She was born in Kingston. Walker is the former Olympic 400 m hurdles champion. She held the Olympic record of 52.64, set at the 2008 Beijing Olympics, and her time of 52.42 seconds at the 2009 World Championships in Berlin was the second fastest time in history at the time.
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.
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.
80 metres hurdles is a distance in hurdling run by women until 1972 in international competitions.
Karsten Warholm is a Norwegian sprinter who competes in the 400 metres and 400 m hurdles. He is the 2020 Tokyo Olympic champion, a three-time world champion and the world record holder in the latter event.
Oluwakemi "Kemi" Adekoya is a Nigerian-born track and field athlete who competes for Bahrain. She specialises in the 400 metres hurdles and has a personal best of 53.39 seconds – a Bahraini and Asian record. In January 2019, it was reported that Adekoya tested positive for an illegal steroid stanozolol in an out-of-competition test in November 2018 and was provisionally suspended. All of her results achieved after 24 August 2018 were also stripped.
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.
Kristi Castlin is an American track and field athlete who specializes in the 100 metres hurdles. She won a bronze medal at the 2016 Olympics. Her personal best for the event is 12.50 seconds, set on July 8, 2016, during the finals of the 2016 United States Olympic Trials, in which she qualified for the 2016 Summer Olympics by placing 2nd. She was the 2012 American champion in the indoor 60 metres hurdles and represented the United States at the 2012 IAAF World Indoor Championships. She shares the world record for the shuttle hurdle relay, with her time of 50.78 seconds set in 2013.
Danielle Gracia Williams is a Jamaican track and field athlete specialising in the 100 metres hurdles. She is best known for winning gold medals at the 2015 World Championships and at the 2023 World Championships. In addition, she won a bronze medal at the 2019 World Championships, won two medals at Summer Universiades, bronze in 2013 and gold in 2015, won silver medals at the 2018 Commonwealth Games and the 2018 NACAC Championships, and represented her country at the 2013 World Championships, all in the 100m hurdles.
Hassane Fofana is an Italian athlete specialising in the high hurdles. He is of Ivorian descent. He competed at the 2020 Summer Olympics, in 110 m hurdles.
Elvira Uladzimirauna Herman is a Belarusian athlete specialising in the sprint hurdles. She won the gold medal at the 2018 European Championships At the 2018 European Athletics Golden Tracks awards in Lausanne Elvira received the award as Europe's female rising star in 2018.
Andrea Carolina Vargas Mena is a Costa Rican athlete specialising in the sprint hurdles. She is the current NR holder with the time of 12.64 seconds which was set at the IAAF World Championships in Doha 2019. She represented her country at the 2018 World Indoor Championships without advancing from the first round. She participated in the 2019 Panamerican Games in Lima, Peru, achieving first place in 100 meter hurdles. She competed at the 2020 Summer Olympics.
Haiti competed at the 2019 Pan American Games in Lima, Peru from July 26 to August 11, 2019. Haiti is one of only 17 countries to have participated in all editions of the Pan American Games.
The women's 100 metres hurdles competition of the athletics events at the 2019 Pan American Games will take place between the 7 and 8 of August at the 2019 Pan American Games Athletics Stadium. The defending Pan American Games champion is Queen Harrison from the United States.
Mette Laugesen Graversgaard is a Danish athlete who specialises in the 60 metres hurdles and 100 metres hurdles.
Haiti 
