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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.
The British Virgin Islands sent a delegation to compete at the 2012 Summer Olympics in London, United Kingdom, which took place between 27 July to 12 August 2012. The country's participation in London marked its eighth appearance at the Summer Olympics since its debut in the 1984 Summer Olympics. The British Virgin Islands delegation included two track and field athletes, 100 meter sprinters J'maal Alexander and Tahesia Harrigan-Scott. Alexander failed to progress through the heats whilst Harrigan-Scott was eliminated in her event's quarterfinals.
The Marshall Islands did not compete at the 2011 World Championships in Athletics from August 27 to September 4 in Daegu, South Korea.
The 2019 IAAF World Athletics Championships was the seventeenth edition of the biennial, global athletics competition organised by the International Association of Athletics Federations (IAAF), since renamed World Athletics. It was held between 27 September and 6 October 2019 in Doha, Qatar, at the renovated multi-purpose Khalifa International Stadium, but reduced to 21,000 available seats. 1,772 athletes from 206 teams competed in 49 athletics events over the ten-day competition, comprising 24 events each for men and women, plus a mixed relay. There were 43 track and field events, 4 racewalking events, and 2 marathon road running events. The racewalking and marathon events were held in Doha Corniche.
Tuvalu competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The country's participation at Rio de Janeiro marked its third consecutive appearance at the Summer Olympics since its debut in 2008. The delegation included a single track and field athlete: sprinter Etimoni Timuani. Etimoni was also the nation's flagbearer in the Parade of Nations. He did not progress past the first round of his men's 100 metres competition.
Afghanistan competed at the 2017 World Championships in Athletics in London, United Kingdom, between 4 and 13 August 2017, with sole athlete Said Gilani competing in the men's 100 metres.
Kiribati competed at the 2019 World Championships in Athletics in Doha, Qatar, from 27-6 October 2019.
Afghanistan competed at the 2019 World Athletics Championships in Doha, Qatar, from 27 September to 6 October 2019. Said Gilani was the only athlete representing Afghanistan for the second consecutive championships, in the men's 100 metres event.
Xu Zhouzheng is a Chinese athlete. He competed in the men's 100 metres event at the 2019 World Athletics Championships.
Ebrahima Camara is a Gambian athlete. He competed in the men's 100 metres event at the 2019 World Athletics Championships.
Stern Noel Liffa is a Malawian athlete. He competed in the men's 100 metres event at the 2019 World Athletics Championships. He competed in the preliminary round and he did not advance to compete in the heats.
Aruba has competed at the World Athletics Championships on eleven occasions. It did not send a delegation for the 1983 championships or the editions from 2001 to 2009. Its competing country code is ARU. The country has not won any medals at the competition and as of 2019 no Aruban athlete has reached the top eight of an event. Its best performance is by Cornelia Melis, who placed 21st in the 1991 women's marathon.
Mauritania competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Marshall Islands competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Palau competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Guam competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Guinea competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Nauru competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Togo competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
Malawi competed at the 2019 World Athletics Championships in Doha, Qatar from 27 September to 6 October 2019.
References
- ↑ "Said Gilani". IAAF. Retrieved 28 September 2019.
- ↑ "100 Metres Men - Preliminary Round" (PDF). IAAF (Doha 2019). Retrieved 28 September 2019.
- ↑ "ATHLETES by COUNTRY and EVENT" (PDF). IAAF. Retrieved 29 September 2019.
- ↑ "Men's 100 metres – Preliminary Round" (PDF). 2019 World Athletics Championships. Archived (PDF) from the original on 28 September 2019. Retrieved 17 August 2020.
- ↑ SAS TV Sports (20 August 2023). "1st Position: IMRANUR RAHMAN PR 3/4 World Athletics Championship Budapest 2023" (video). youtube.com.
- ↑ "Said GILANI AFG London 2017 IAAF World Championships 100m Prelims" (video). youtube.com. 4 August 2017.
