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.
Veronica Shanti Pereira is a Singaporean track and field athlete who specialises in the 100 m, 200 m, 4 x 100 m, and 4 x 400 m. She holds the 100 m national record (11.20s), 200 m national record (22.57s), 400 m national record (53.67s), 200 m SEA Games record (22.69s), and the 200 m Asian Athletics Championships games record (22.70s). She was ranked 1st in Asia in 2023 for both the 100 m and 200 m based on World Athletics' records.
Oluwatobiloba Ayomide "Tobi" Amusan is a Nigerian track and field athlete who specialises in the 100 metres hurdles and also competes as a sprinter. Amusan is the current world record holder in the 100 metres hurdles with a time of 12.12 seconds which she set at the 2022 women's 100 metres hurdles semi final in Eugene Oregon. She is the current Commonwealth and African champion in the 100 m hurdles, as well as the meet record holder in those two competitions. Amusan became the first ever Nigerian world champion and world record holder in an athletics event when she won the 2022 World Championships 100 m hurdles gold medal, setting the current world record of 12.12 seconds (+0.9 m/s) in the semi-final, followed up by a 12.06 seconds (+2.5 m/s) in the final. She won back-to-back Commonwealth and African titles in 2018 and 2022 in the 100 m hurdles and is also a two-time African Games champion in the event. She is also the current Diamond league champion in the 100 metres hurdles having won the final in 12.33 seconds (+1.8 m/s) achieving a winning streak in 2021, 2022 and 2023.
The men's 100 metres at the 2018 Commonwealth Games, as part of the athletics programme, took place in the Carrara Stadium on 8 and 9 April 2018. Akani Simbine of South Africa won the gold medal, running a time of 10.03 seconds in the final.
The women's 100 metres at the 2018 Commonwealth Games, as part of the athletics programme, took place in the Carrara Stadium on 8 and 9 April 2018.
Enoch Obaloluwa Adegoke is a Nigerian sprinter. He was the 2019 African U20 champion in the 100 metres. He is also an Olympic Games and Commonwealth Games finalist in the 100 metres.
The women's 100 metres event at the 2020 Summer Olympics took place on 30 and 31 July 2021 at the Japan National Stadium. 71 athletes from 55 nations competed at the event.
Zoe Hobbs is a New Zealand track and field sprinter competing in the 60 metres, 100 m and 200 m. She is the Oceanian indoor record holder for the 60 m and the Oceanian record holder for the 100 m.
Nzubechi Grace Nwokocha is a Nigerian sprinter, a multiple time national champion over 100 metres. She is currently banned following a doping violation at the 2022 Commonwealth Games which caused her country to be stripped of the gold medal in the 4x100m relay.
Rhoda Njobvu is a Zambian athlete who specializes in sprinting.
The men's 100 metres at the 2022 Commonwealth Games, as part of the athletics programme, took place at the Alexander Stadium from 2 and 3 August 2022.
The Men's 100 metres (T12) at the 2022 Commonwealth Games, as part of the athletics programme, took place in the Alexander Stadium on 3 and 4 August 2022.
The men's 100 metres event at the 2024 Summer Olympics took place on 3 August and 4 August at the Stade de France in Paris. Noah Lyles won the gold medal, setting a new personal best in the 100m and giving the United States its first victory in the event since 2004. Jamaican Kishane Thompson finished in second, taking the silver medal. The winning time of 9.79 was achieved by both Lyles and Thompson, but Lyles crossed the line five one thousandths of a second faster to take gold. Lyles' teammate Fred Kerley finished third in 9.81, winning bronze.
The women's 100 metres at the 2024 Summer Olympics was held in four rounds at the Stade de France in Paris, France, on 2 and 3 August 2024. This was the twenty-third time that the women's 100 metres has been contested at the Summer Olympics. A total of 40 athletes qualified for the event by entry standard or ranking. Julien Alfred won Saint Lucia's first-ever Olympic medal after taking gold in the final.
The women's 200 metres at the 2024 Summer Olympics was held in four rounds at the Stade de France in Paris, France, between 4 and 6 August 2024. This was the twentieth time that the women's 200 metres was contested at the Summer Olympics. A total of 48 athletes were able to qualify for the event by entry standard or ranking.
