Togo competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its seventh appearance in the Summer Olympics since its debut at the 1972 Summer Games in Munich, West Germany. The delegation included two track and field athletes and a single canoeist; Jan Sekpona in the men's 800 metres, Sandrine Thiébaud-Kangni in the women's 400 metres, and Benjamin Boukpeti in the men's K-1. Both Sekpona and Thiébaud-Kangni were eliminated in the first round of their competitions, while Boukpeti progressed to the semi-finals.
Lesotho sent a delegation to compete in the 1972 Summer Olympics in Munich, West Germany from 26 August to 11 September 1972. This was the African country's first time participating at the Olympic Games. Lesotho's delegation consisted of a single sprinter, Motsapi Moorosi. He competed in two events, being eliminated in the first round of the 100 meters, and advancing to the quarter-finals of the 200 meters.
Equatorial Guinea participated in the 2000 Summer Olympics in Sydney, Australia, which was held from 15 September to 1 October 2000. The country's participation in Sydney marked its fifth appearance in the Summer Olympics since its debut at the 1984 Summer Olympics. The delegation included one middle-distance runner, one short-distance sprinter and two swimmers: José Luis Ebatela Nvo, Mari Paz Mosanga Motanga, Eric Moussambani and Paula Barila Bolopa respectively. All four athletes qualified for the games through wildcard places. Moussambani was selected as the flag bearer for the opening ceremony. The four athletes were unable to advance beyond the first rounds of their respective events, with Moussambani and Bolopa attracting attention for their poor performances, but were applauded by the crowds.
Tunisia first participated at the Olympic Games in 1960, and has sent athletes to compete in every Summer Olympic Games except when they participated in the American-led boycott of the 1980 Summer Olympics and has never participated in the Winter Olympic Games.
Saint Kitts and Nevis first participated at the Olympic Games in 1996, and have competed in every Summer Olympic Games since then. The country has never won an Olympic medal and has not competed at the Winter Olympic Games.
Djibouti has participated in nine Summer Olympic Games as of the completion of the 2020 Summer Olympics in Tokyo. They have never competed in the Winter Olympic Games. Djibouti debuted at the 1984 Summer Olympics in Los Angeles, United States of America with three athletes, but did not take home a medal. The highest number of Djiboutian athletes participating in a summer Games is eight in the 1992 games in Barcelona, Spain. Only one Djiboutian athlete has ever won a medal at the Olympics, marathon runner Hussein Ahmed Salah, who won a bronze medal in the 1988 marathon.
Bayron Efrén Piedra Avilés is an Ecuadorian middle distance and long-distance runner.
Somalia sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. The country's participation at Beijing marked its seventh in the Summer Olympics since its debut in 1972 Games. The delegation included two track and field athletes: sprinter Samiya Yuusf Omar and long-distance runner Abdinasir Said Ibrahim. Neither athlete progressed past the first round of their respective competitions. Omar's story, having trained in Mogadishu during the Somali Civil War, was covered by the media at the time, and later featured in a graphic novel following her death.
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.
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.
Pedro Juan Mejía Eusebio is a Dominican sprinter, who specialized in the 400 metres. He won two bronze medals, as a member of the Dominican Republic national team, in the men's 4 × 400 m relay at the 2007 Pan American Games in Rio de Janeiro, Brazil, and at the 2008 IAAF World Indoor Championships in Valencia, Spain.
Aunese Curreen is a Samoan middle-distance runner, who specialized in the 800 metres. He is currently a member of the North Harbour Bays Athletics Club in Auckland, New Zealand.
Onalenna Oabona Baloyi is a Botswana middle distance runner, who specialized in the 800 metres.
Sabina Veit is a Slovenian sprinter. She set a personal best and an Olympic A-standard time of 22.74 seconds, by winning the 200 metres at the Slovenian Open Athletics Championships, coincidentally in her home city. She also won a bronze medal in the same distance at the 2009 Summer Universiade in Belgrade, finishing her time at 23.34 seconds.
Sung Min is a South Korean former swimmer, who specialized in freestyle and backstroke events. He represented South Korea in three editions of the Olympic Games, and held multiple national championship titles and swimming records in the relay freestyle and backstroke events. Sung had also won a total of five bronze medals, including one from the 50 m backstroke, at the 2002 Asian Games in Busan, South Korea, and at the 2006 Asian Games in Doha, Qatar.
Lai Lai Win is a Burmese sprinter. She won a silver medal for the women's 400 metres at the 2007 Southeast Asian Games in Bangkok, Thailand, with a time of 55.11 seconds.
Mourad Marofit is a Moroccan long-distance runner. He set his personal best time of 13:02.84, by winning the men's 5000 metres at the KBC Night of Athletics in Heusden-Zolder, Belgium.
At the 2001 SEA Games, the athletics events were held in Kuala Lumpur, Malaysia. A total of 46 events were contested, of which 24 by male and 22 by female athletes. The track and field events were hosted at the National Stadium, Bukit Jalil, the marathons were held around Merdeka Square, and the racewalking events took place at Titiwangsa Lake Gardens.
The 100 metres at the Summer Olympics has been contested since the first edition of the multi-sport event. The men's 100 metres has been present on the Olympic athletics programme since 1896. The 100 metres is considered one of the blue ribbon events of the Olympics and is among the highest profile competitions at the games. It is the most prestigious 100 metres race at an elite level and is the shortest sprinting competition at the Olympics – a position it has held at every edition except for a brief period between 1900 and 1904, when a men's 60 metres was contested.
The 4 × 100 metres relay at the Summer Olympics is the shortest track relay event held at the multi-sport event. The men's relay has been present on the Olympic athletics programme since 1912 and the women's event has been continuously held since the 1928 Olympic Games in Amsterdam. It is the most prestigious 4×100 m relay race at elite level.
Myanmar 
