The World Athletics Championships, known as the IAAF World Championships in Athletics until 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 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor running track, it is one lap around the track. Runners start in staggered positions and race in separate lanes for the entire course. In many countries, athletes previously competed in the 440-yard dash (402.336 m)—which is a quarter of a mile and was referred to as the "quarter-mile"—instead of the 400 m (437.445 yards), though this distance is now obsolete.
Andrew Howe is an American-born Italian athlete who specializes in the long jump and sprinting. He won this event as well as the 200 metres at the 2004 World Junior Championships. He was successful at senior level at a young age, winning a long jump bronze at the 2006 IAAF World Indoor Championships before becoming the European Champion later that year. In 2007 he became the European Indoor Champion and won the silver medal at the 2007 World Championships in Athletics.
Laurent Ottoz is an Italian hurdler. He won four medals, at senior level, at international athletics competitions.
Matteo Galvan is an Italian athlete who specializes in the 200 and 400 metres. His career highlight so far is the 2009 European Indoor Championships, where he placed sixth in the 400 metres and won a gold medal in the relay.
Eilidh Doyle is a retired British track and field athlete. Originally running as Eilidh Child, she specialised in the 400 metres hurdles outdoors, and the 400 metres flat indoors, as well as the 4 x 400 metres relay on both surfaces. She represented Great Britain at the 2012 Olympic Games in London, and won an Olympic bronze medal in the 4 x 400 metres relay at the 2016 Games in Rio de Janeiro. Individually, she is the 2014 European Champion and a three-time Commonwealth silver medalist in the 400 metres hurdles.
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.
Paolo Dal Molin is an Italian athlete competing in the 110 metres hurdles. He competed at the 2020 Summer Olympics, in 110 m hurdles.
Karsten Warholm is a Norwegian sprinter who competes in the 400 metres and 400 m hurdles. He is the 2020 Tokyo Olympic champion, silver medalist at the 2024 Paris Olympics, three-time world champion and world record holder in the latter event.
Janieve Russell is a Jamaican track and field athlete who competes mainly in the 400 metres hurdles and the 400 metres sprint. She won an Olympic bronze medal in the 4 × 400 m relay in Tokyo 2021, where she also finished fourth in the 400m hurdles final in a personal best of 53.08 secs. She is a four-time Commonwealth Games gold medallist, winning the 400m hurdles title in 2018 and 2022, and the 4 × 400 m relay in 2014 and 2018. She has also won two relay silvers at the World Championships and a relay gold at the World Indoor Championships.
Anna Bongiorni is an Italian sprinter, whose most prestigious achievement at the international individual senior level is the bronze medal at the Universiade. Bongiorni is a two-time national champion at senior individual level. She competed at the 2020 Summer Olympics, in 100 m.
Ayomide Temilade Oluwatoyosi Folorunso is an Italian athlete specialising in the 400 metres hurdles. She competed in the 4 × 400 metres relay at the 2015 World Championships in Beijing.
Eseosa Fostine "Fausto" Desalu is an Italian sprinter who specialises in the 200 metres winning a silver medal in that event at the 2018 Mediterranean Games and a gold medal in the 4×100 m relay at the 2020 Summer Olympics.
Lamont Marcell Jacobs Jr. is an Italian track and field sprinter and former long jumper. He is the 2020 Olympic 100 metres champion, the 2022 60 metres world champion, the 2022 and 2024 European 100 metres champion, and a member of the gold medal-winning 4 × 100 m relay team at the 2020 Olympics. He currently holds the 100 metres European record, the 60 metres European record, and is the first person to ever qualify for and win the men's 100 metres Olympic final for Italy.
Raphaela Boaheng Lukudo is an Italian sprinter specialized in the 400 m, who won four medals at international senior level with Italian national track relay team of the 4×400 m relay.
Luminosa Bogliolo is an Italian hurdler who won a gold medal at the 2019 Summer Universiade and a silver medal at the 2018 Mediterranean Games.
Edoardo Scotti is an Italian male 400 meter dash runner, who won a gold medal at the 2018 IAAF World U20 Championships and was a finalist at the 2018 European Athletics Championships with the Italian national track relay team. He competed at the 2020 Summer Olympics, in 400 m.
Femke Bol is a Dutch track and field athlete who competes in hurdling and sprinting. She specialises in the 400 metres hurdles, where she is the 2023 World Champion, and in the 400 metres, where she is the 2024 World Indoor Champion and the short track world record holder. In the 4 × 400 metres relay, she is the 2023 World Champion and the 2024 World Indoor Champion with the Dutch women's team and the 2024 Olympic Champion with the Dutch mixed team.
Eleonora Marchiando is an Italian athlete. She competed in the women's 400 metres event at the 2021 European Athletics Indoor Championships. She competed at the 2020 Summer Olympics, in 400 m hurdles.
