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 with 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.
Jordan Melissa Hasay is an American distance runner. She grew up in Arroyo Grande, California, and attended Mission College Preparatory High School in San Luis Obispo. She was unanimously selected 2008 Girls High School Athlete of the Year by the voting panel at Track and Field News. In March 2009, she became the ninth high school athlete and third woman on the cover of Track and Field News magazine. She attended the University of Oregon, where she studied business administration and competed on the cross country and track and field teams earning 18 All-American honors, 2011 Mile and 3,000 meters NCAA titles. Her father was a high school basketball star in Pennsylvania, and her mother was a national level swimmer in her native England. Jordan Hasay is no longer coached by Alberto Salazar due to his suspension.
The men's 4 × 400 metres relay at the 2009 World Championships in Athletics was held at the Olympic Stadium on August 22 and August 23.
Shana L. Williams is a retired American track and field athlete who competed in the long jump. She is a two-time Olympian, having competed in her event at the 1996 and 2000 Summer Olympics. Williams won the silver medal at the 1999 IAAF World Indoor Championships in Maebashi. Her personal best of 7.01 m ranks her as the fifth best American in the long jump on the all-time lists. She is a two-time USA Indoor champion and also won the gold medal at the 1998 Goodwill Games.
Francena Lynette McCorory is a retired American track and field athlete, known primarily for running the 400 meters. She was the 2011 World bronze medalist in the 400 meters and was a member of the gold medal-winning 2012 and 2016 United States Olympic 4 x 400 m relay teams. She was the IAAF 400 meter Indoor World Champion in 2014. McCorory retired in 2021.
Regina George Grause is an American-born Nigerian sprinter who specializes in the 400 metres. She represented Nigeria at the 2012 Summer Olympics and was the silver medallist at the African Championships in 2012.
The women's 4 × 400 metres relay competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Estádio Olímpico João Havelange on 19–20 August.
Emily Infeld is an American long-distance runner. She regularly competes in the 5000 m and 10,000 m distances during her professional career; in her college career she regularly competed in the 4 × 800 meter relay and 1500 m on up to 5000 m.
The women's 4 × 400 metres relay at the 2015 World Championships in Athletics was held at the Beijing National Stadium on 29 and 30 August.
Leleith Hodges is a Jamaican former track and field sprinter who competed mainly in the 100 metres. She was one of Jamaica's most prominent female runners of the 1970s.
Raevyn Rogers is an American middle-distance athlete. She won a bronze medal in the 800 meters at the 2020 Tokyo Olympics, becoming the fourth fastest woman in U.S. history in the event. At the 2019 World Championships, Rogers came from seventh with 100m remaining in the race to place silver over USA teammate Ajeé Wilson in bronze. She earned a world indoor title as a member of national 4x400 m relay squad that took gold at the 2018 World Indoor Championships.
The men's 4 × 400 metres relay at the 2016 IAAF World Indoor Championships took place on March 19 and 20, 2016.
The women's 4 × 400 metres relay at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 12–13 August.
The men's 4 × 400 metres relay at the 2018 IAAF World Indoor Championships took place on 3 and 4 March 2018.
The women's 4 × 400 metres relay at the 2018 IAAF World Indoor Championships took place on 3 and 4 March 2018.
The women's 4 × 400 metres relay event at the 2020 Summer Olympics took place on 5 and 7 August 2021 at the Japan National Stadium. There were 16 competing relay teams, with each team having at least 5 members from which 4 were selected in each round.
The 1998 IAAF World Road Relay Championships was the fourth and final edition of the global, international marathon relay competition, organised by the International Association of Athletics Federations (IAAF). The event took place on 18–19 April in Manaus, Brazil with the participation of 222 athletes from 28 nations. The women's race took place on Saturday 18 April, starting at 9:00 AM Amazon Standard Time, and featured twelve national teams comprising a total 72 athletes. The men's race took place on Sunday 19 April, also starting at 9:00 AM Amazon Standard Time, and featured 25 national teams comprising a total 150 athletes.
The mixed 4 × 400 metres relay at the 2019 World Athletics Championships was held at the Khalifa International Stadium in Doha from 28 to 29 September 2019.
The women's 4 × 400 metres relay at the 2019 World Athletics Championships was held at the Khalifa International Stadium in Doha, Qatar, from 5 to 6 October 2019. In the final the Jamaican team were initially disqualified, but were reinstated as the bronze medallists upon appeal.
The women's 4 × 400 metres relay at the 2022 World Athletics Indoor Championships took place on 20 March 2022.
