The World Athletics Championships, known as the IAAF World Championships in Athletics till 2019, are a biennial athletics competition organized by World Athletics, formerly IAAF, International Association of Athletics Federations. Alongside Olympic Games, they represent the highest level championships of senior international outdoor athletics competition for track and field athletics globally, including marathon running and race walking. Separate World Championships are held by World Athletics for certain other outdoor events, including cross-country running and half-marathon, as well as indoor and age-group championships.
The 4 × 100 metres relay or sprint relay is an athletics track event run in lanes over one lap of the track with four runners completing 100 metres each. The first runners must begin in the same stagger as for the individual 400 m race. Each runner carries a relay baton. Before 2018, the baton had to be passed within a 20 m changeover box, preceded by a 10-metre acceleration zone. With a rule change effective November 1, 2017, that zone was modified to include the acceleration zone as part of the passing zone, making the entire zone 30 metres in length. The outgoing runner cannot touch the baton until it has entered the zone, and the incoming runner cannot touch it after it has left the zone. The zone is usually marked in yellow, frequently using lines, triangles or chevrons. While the rule book specifies the exact positioning of the marks, the colours and style are only "recommended". While most legacy tracks will still have the older markings, the rule change still uses existing marks. Not all governing body jurisdictions have adopted the rule change.
Sharon Marie Stouder, also known by her married name Sharon Stouder Clark, was an American competition swimmer, three-time Olympic champion, and former world record-holder in four events.
Pamela Kilborn-Ryan, AM, MBE is an Australian former athlete who set world records as a hurdler. For three years, she was ranked as the world's top woman hurdler.
The men's 4 × 100 metres relay was the shorter of the two men's relays on the Athletics at the 1964 Summer Olympics program in Tokyo. It was held on 20 October and 21 October 1964. 21 teams, for a total of 85 athletes, from 21 nations competed, with 1 team of 4 not starting in the first round. The first round and the semifinals were held on 20 October with the final on 21 October.
The men's 4 × 400 metres relay was the longer of the two men's relays on the Athletics at the 1964 Summer Olympics program in Tokyo. It was held on 20 October and 21 October 1964. 20 teams, for a total of 80 athletes, from 20 nations entered, with 3 teams of 4 not starting in the first round. The first round was held on 20 October with the final on 21 October.
Poland competed at the 1964 Summer Olympics in Tokyo, Japan. 140 competitors, 115 men and 25 women, took part in 87 events in 12 sports.
Gabrielle Lisa "Gabby" Thomas is an American track and field athlete in 100 and 200 meter sprint. She won the bronze medal in the 200 m and a silver as part of the women's 4 × 100 m relay at the 2020 Tokyo Olympics. On August 25, 2023, she claimed the 200 m silver medal in the 2023 World Athletics Championships in Budapest with a time of 21.81 seconds. She would also go on to win gold as part of Team USA in the women's 4x100m relay final with a championship record of 41.03 seconds. At the 2024 Summer Olympics in Paris, she won the gold medal in the 200 meter women's race.
Janet Mary Simpson was a British athlete who competed in sprint events and the 400 metres.
Cynthia Lee Goyette, also known by her married name Cynthia McCulloch, is an American former competition swimmer, Olympic champion, and former world record-holder. She represented the United States as an 18-year-old at the 1964 Summer Olympics in Tokyo. She won a gold medal for swimming the breaststroke leg for the first-place U.S. team in the women's 4 × 100-metre medley relay. The U.S. relay team set a new world record of 4:33.9 in the event final; Goyette's teammates included Cathy Ferguson (backstroke), Sharon Stouder (butterfly), and Kathy Ellis (freestyle).
Gary Steven Ilman was an American competition swimmer, two-time Olympic gold medalist, and former world record-holder in two relay events. He would later coach swimming, serving as a Head Coach at Colorado State, and work in the electronics industry.
Lillian Debra Watson, commonly known by her nickname Pokey Watson, and later by her married name Lillian Richardson, is an American former competition swimmer, two-time Olympic champion, and former world record-holder in three events.
Arquímedes Herrera was a Venezuelan track and field athlete who competed in the sprint events and was ranked #4 in the world in the 100 m in 1963. As a teenager Herrera spent time in the Venezuelan military, taking up his athletics career after his discharge. He claimed three medals at the 1963 Pan American Games held in São Paulo, Brazil. In the final of the 200m dash three athletes crossed the finish line with the same time 21.2 seconds. The Photo finish defined the Venezuelan Rafael Romero stay with gold medal; American Ollan Cassell, with silver; and Herrera, with the bronze. In 1964 he equaled the world record 200-meter dash in 20.5 seconds and also participated at the 1964 Summer Olympics in Tokyo, Japan, where he made the semi-finals in both the 100 metres and 200 metres and was a member of the Venezuelan team which finished sixth in the final of the 4 × 100 metres relay.
Mujinga Kambundji is a Swiss sprinter. She won the bronze medal in the 200 metres at the 2019 World Championships. Kambundji is the 60 metres 2022 World indoor champion, becoming the joint fourth-fastest woman of all time in the event, after earning a bronze in 2018. She is a three-time European Championships medallist, with gold for the 200 m and silver for the 100 m in 2022, and bronze for the 100 m in 2016. At the European Indoor Championships, she earned gold in the 60 m in 2023 and bronze in 2017.
Geraldina Rachel Asher-Smith, OLY is a British sprinter internationally active since 2011. In 2019 she was the first British woman to win a World title in a sprint event.
Emma Jennifer McKeon, is an Australian former competitive swimmer. She is an eight-time world record holder, three current and five former, in relays. Her total career haul of 14 Olympic medals following the 2024 Olympic Games made her Australia's most decorated Olympian and included one gold medal from the 2016 Summer Olympics in Rio de Janeiro, four gold medals from the 2020 Summer Olympics in Tokyo and one gold medal from the 2024 Summer Olympics in Paris. With four gold and three bronze medals she was the most decorated athlete across all sports at the 2020 Summer Olympics, and tied for the most medals won by a woman in a single Olympic Games. She also won 20 medals, including five gold medals, at the World Aquatics Championships; and a record 20 medals, including 14 gold, at the Commonwealth Games.
Elaine Thompson-Herah is a Jamaican sprinter who competes in the 60 metres, 100 metres and 200 metres. Regarded as one of the greatest sprinters of all time, she is a five-time Olympic champion, the fastest woman alive in the 100 m, and the third fastest ever in the 200 m.
Filippo Tortu is an Italian sprinter with a personal best in the 100 meters of 9.99, the first Italian in history to break the 10 seconds barrier, and the second fastest Italian in history following Marcell Jacobs. He won the gold medal in 100 metres at the 2017 European U20 Championships and the silver medal at the 2016 World U20 Championships. He ran the anchor leg in the 4×100m relay of the Italian team that won the gold medal at the 2020 Summer Olympics and at the 2024 European Championships, and the silver medal at the 2023 World Athletics Championships.
Lieke Klaver is a Dutch track and field athlete who competes in sprinting. She specializes in the 200 metres and in the 400 metres. In the 4 × 400 metres relay, she is the 2023 World Champion and the 2024 World Indoor Champion with the Dutch women's team. She won a gold medal at the 2024 Summer Olympics in the mixed 4 x 400 metres relay.
