Sanya Richards-Ross is a retired Jamaican-born 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.
The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap, totaling 1600 meters. It is traditionally the final event of a track meet. The first leg and the first bend of the second leg are run in lanes. Start lines are thus staggered over a greater distance than in an individual 400 metres race; the runners then typically move to the inside of the track. The slightly longer 4 × 440 yards relay, on an Imperial distance, was a formerly run British Commonwealth and American event, until metrication was completed in the 1970s.
The 4 × 400 metre relay at the 2005 World Championships in Athletics was held at the Helsinki Olympic Stadium on August 13 and August 14.
The 14th IAAF World Championships in Athletics was an international athletics competition held in Moscow, Russia, from 10 to 18 August 2013. Initially, Russia won the most gold medals to top the table for the first time since 2001. It was also the first time ever the host nation took the top of the medal table. However, following the disqualification of Russian sprinter Antonina Krivoshapka for doping and after the redistribution of medals in the Women's 4 × 400 metres relay, the United States moved to the top of the medal table with eight golds. In the overall medal count, the United States won 26 medals in total, followed by Kenya with 12. With 1,784 athletes from 203 countries it was the biggest single sports event of the year. The number of spectators for the evening sessions was 268,548 surpassing Daegu 2011.
Yuliya Aleksandrovna Gushchina is a Russian sprinter who specializes in the 200 metres.
Antonina Vladimirovna Krivoshapka is a Russian sprinter who specializes in the 400 metres. She competed at the 2012 Summer Olympics, where her team originally was awarded a silver medal in the 4 × 400 m relay. Krivoshapka and her teammates were later stripped of this medal after Krivoshapka tested positive for the steroid turinabol.
The women's 400 metres at the 2009 World Championships in Athletics was held at the Olympic Stadium on 15, 16 and 18 August. The world-leader prior to the competition, Sanya Richards, was regarded as the favourite in the event, although her previous failure to convert circuit dominance to major championship success raised some doubts. Reigning Olympic and world champion Christine Ohuruogu entered the championships as only the 25th fastest in the world that year, although a low-key run up also preceded her previous victories. Jamaicans Shericka Williams and Novlene Williams-Mills were predicted as possible medallists, while Russian Antonina Krivoshapka held the second fastest time in the world prior to the tournament.
The women's 400 metres competition at the 2012 Summer Olympics took place between 3–5 August at the Olympic Stadium.
The women's 4 × 400 metres relay competition at the 2012 Summer Olympics in London, United Kingdom was held at the Olympic Stadium on 10–11 August. 2012
The Women's 400 metres at the 2011 World Championships in Athletics was held at the Daegu Stadium on August 27, 28 and 29.
The Women's 4 × 400 metres relay event at the 2011 World Championships in Athletics was held at the Daegu Stadium on 2 and 3 September. Friday and Saturday. This is a change in schedule from previous years when all the relays were at the end of the program. This might necessitate a change in strategy to allow for team members involved in other events.
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.
Ashley Spencer is an American track and field athlete who competes in the 400 metres and the 400 metres hurdles. In the 400m hurdles, she is the 2016 Olympic bronze medalist. In the 400m, she is the 2012 World Junior Champion and the 2016 World Indoor silver medalist. She is coached by 1996 Olympic bronze medalist Tonya Buford-Bailey.
The women's 400 metres at the 2013 World Championships in Athletics was held at the Luzhniki Stadium on 10–12 August.
Phyllis Chanez Francis is an American track and field athlete. She won the gold medal at the 2017 World Championships in the 400 metres and 4 × 400 metres relay events.
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.
The women's 400 metres at the 2015 World Championships in Athletics was held at the Beijing National Stadium on 24, 25 and 27 August. Christine Ohuruogu of Great Britain entered the competition as the defending champion.
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.
The 4 × 400 metres relay at the World Championships in Athletics has been contested by both men and women since the inaugural edition in 1983. The competition features three formats in relation to gender: men, women, and mixed. The 2019 edition added in the mixed competition. The format utilizes one set of heats qualifying the top 8 into a final.
