Omar Cisneros Bonora is a Cuban track and field athlete who competes in the 400 metres hurdles. He is the Cuban national record holder for the event with his personal best of 47.99 seconds. He won gold medals in the hurdles and 4×400 metres relay at the Pan American Games in 2011.
Daisurami Bonne Rousseau is a Cuban track and field sprint athlete who specialises in the 400 metres. A two-time participant at the World Championships in Athletics, her personal best for the event is 51.69 seconds. At the 2011 Pan American Games, she was the 400 m silver medallist and a relay gold medallist. She has also won medals at the Central American and Caribbean Championships in Athletics.
Maiko Fujino is a Japanese swimmer, who specialized in long-distance freestyle and individual medley events. She represented her nation Japan at the 2008 Summer Olympics, and has won a career total of six medals in a major international competition, spanning the Pan Pacific Championships and three editions of the Asian Games. Fujino was also a student at Takushoku University in Tokyo.
Nataliya Khudyakova is a Ukrainian swimmer, who specialized in freestyle events.
Mahau Camargo Suguimati is a Brazilian track hurdler of Japanese ancestry. Since the age of eight, Suguimati had lived and studied for sixteen years in Niiza, Saitama Prefecture, Japan. Suguimati also attended schools around the prefecture, where he discovered his natural ability and talent of running and hurdling, under his personal coach and trainer Atsushi Hishinuma. He made his international debut, and represented his birth nation Brazil at the 2007 Pan American Games in Rio de Janeiro, where he finished seventh in the final of the 400 m hurdles, with his personal best time of 49.63 seconds.
Precious Oluoma Nwoke Bichiri is a Nigerian track and field athlete, who specialized in the 400 metres. Nwoke competed for the women's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with her teammates Folashade Abugan, Joy Amechi Eze, and Muizat Ajoke Odumosu. She ran on the third leg of the second heat, with an individual-split time of 51.83 seconds. She and her team finished the relay in fourth place for a seasonal best time of 3:24.10, giving them a qualifying slot for the final round based on performance. By the following day, Nwoke and her team placed seventh in the finals, with another seasonal best time of 3:23.74.
Carline Muir is a Canadian sprinter, who specialized in the 400 metres. She won the bronze medal for the 400 metres, and ultimately, led her national team to claim the sprint relay title at the 2009 Summer Universiade in Belgrade, Serbia. She is also a three-time junior national champion, a two-time silver medalist at the Canadian Track and Field Championships.
Adrienne Power is a Canadian sprinter, who specialized in the 200 metres. She won two bronze medals for both the 200 metres and 4×400-metre relay at the 2010 Commonwealth Games in Delhi, India.
Dimitra Dova is a Greek sprinter, who specialized in the 400 metres. She won the gold medal for her category at the 2005 Mediterranean Games in Almería, Spain, with a time of 52.67 seconds, defeating her compatriot Phara Anacharsis by three hundredths of a second (0.03).
Sayaka Aoki is a Japanese track and field sprinter and hurdler, who specializes in the 400 metres sprint and 400 metres hurdles. She competed for her country as part of the Japanese women's 4 × 400 metres relay team at the Summer Olympics in 2008 and the World Championships in Athletics three times. She has been a four-time medallist in the relay at the Asian Athletics Championships, including a gold medal in 2011. She won her first major international medal in the hurdles – a bronze – at the 2017 Asian Athletics Championships.
Mayu Kida is a retired Japanese sprinter, who specialized in the 400 metres. Kida competed for the women's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with her teammates Sayaka Aoki, Satomi Kubokura, and Asami Tanno. She ran on the third leg of the first heat, with an individual-split time of 52.72 seconds. Kida and her team finished the relay in last place for a seasonal best time of 3:30.52, failing to advance into the final.
Emmily da Silva Pinheiro is a Brazilian sprinter, who specialized in the 400 metres.
Josiane da Silva Tito is a Brazilian sprinter and middle-distance runner.
Maria Laura Almirão is a Brazilian sprinter, who specialized in the 400 metres. She is a two-time Olympian and a five-time medalist for the 400 metres and sprint relay at the Ibero-American Championships.
Yoel Armando Tapia Gómez is a Dominican sprinter, who specialized in the 400 metres. He won two medals for the national relay team at the 2007 Pan American Games in Rio de Janeiro, Brazil, and also, at the 2011 Pan American Games in Guadalajara, Mexico.
Sandrine Carmen Genevieve Thiébaud-Kangni is a French-Togolese Athlete 1990 tp 2000. 400 metres French Junior Record older since 1995. 53sec73 .4×400 meters 3.32.79 transfere allégeance 2001 to Togolese sprinter and heptathlete. She is a two-time Olympian and a multiple-time national record holder for the 400m and heptathlon. She is also the daughter of middle-distance runner Roger Kangni, who competed in the 800 metres at the 1972 Summer Olympics in Munich.
Kia Davis is a Liberian-American sprinter. She is a multiple-time national record holder in the sprint and hurdles, a three-time USA Track & Field national indoor finalist for the 60 m hurdles, and holds a dual citizenship for Liberia and the United States in order to compete internationally for her categories. She also won the silver medal, as a member of the U.S. team, in the women's 4 × 400 m relay at the 2006 IAAF World Indoor Championships in Moscow, Russia.
Jolanta Kajtoch is a Polish sprinter, who specialized in the 400 metres. Wojcik competed for the women's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with her teammates Grażyna Prokopek, Anna Jesień, and Monika Bejnar. She ran on the second leg of the first heat, with an individual-split time of 51.72 seconds. Wojcik and her team finished the relay in sixth place for a total time of 3:28.23, failing to advance into the final.
Ruth del Carmen Grajeda González is a Mexican sprinter, who specialized in the 400 metres. She won two gold medals, as a member of the Mexican relay team, at the 2006 Ibero-American Championships in Ponce, Puerto Rico, and at the 2008 Ibero-American Championships in Iquique, Chile.
Nallely Vela Rascón is a Mexican sprinter, who specialized in the 400 metres. She won a total of three medals, as a member of the Mexican relay team, at the Ibero-American Championships.
Cuba 
