The decathlon is a combined event in athletics consisting of 10 track and field events. The word "decathlon" was formed, in analogy to the word "pentathlon", from Greek δέκα and ἄθλος. Events are held over two consecutive days and the winners are determined by the combined performance in all. Performance is judged on a points system in each event, not by the position achieved. The decathlon is contested mainly by male athletes, while female athletes typically compete in the heptathlon.
World Athletics, formerly known as the International Amateur Athletic Federation and International Association of Athletics Federations and formerly abbreviated as the IAAF, is the international governing body for the sport of athletics, covering track and field, cross country running, road running, race walking, mountain running, and ultra running. Included in its charge is the standardization of rules and regulations for the sports, certification of athletic facilities, recognition and management of world records, and the organisation and sanctioning of athletics competitions, including the World Athletics Championships. The organisation's president is Sebastian Coe of the United Kingdom, who was elected to the four-year position in 2015 and re-elected in 2019 for a second four-year term, and then again in 2023 for a third four-year term.
The Court of Arbitration for Sport is an international body established in 1984 to settle disputes related to sport through arbitration. Its headquarters are in Lausanne, Switzerland and its courts are located in New York City, Sydney, and Lausanne. Temporary courts are established in current Olympic host cities.
The 100 metres, or 100-meter dash, is a sprint race in track and field competitions. The shortest common outdoor running distance, the 100-meter (109.36 yd) dash is one of the most popular and prestigious events in the sport of athletics. It has been contested at the Summer Olympics since 1896 for men and since 1928 for women. The inaugural World Championships were in 1983.
The World Athletics U20 Championships is a biennial world championships for the sport of athletics organised by the World Athletics, contested by athletes in the under-20 athletics age category (19 years old or younger on 31 December in the year of the competition.
Usain St. Leo Bolt is a Jamaican retired sprinter who is widely considered to be the greatest sprinter of all time. He is an eight-time Olympic gold medalist and the world record holder in the 100 metres, 200 metres, and 4 × 100 metres relay.
Oscar Leonard Carl Pistorius is a South African former professional sprinter and convicted murderer. He was first convicted of culpable homicide of his then-girlfriend, which was subsequently upgraded to murder upon appeal. Both of his feet were amputated when he was 11 months old as a result of a congenital defect; he was born missing the outside of both feet and both fibulas. Pistorius ran in both nondisabled sprint events and in sprint events for below-knee amputees. He was the 10th athlete to compete at both the Paralympic Games and Olympic Games.
Farkhod Saidzhonovich Vasiyev is a TajikistanI professional footballer who plays as a left-back.
An athlete biological passport is an individual electronic record for professional athletes, in which profiles of biological markers of doping and results of doping tests are collated over a period of time. Doping violations can be detected by noting variances from an athlete's established levels outside permissible limits, rather than testing for and identifying illegal substances.
Mokgadi Caster Semenya OIB is a South African middle-distance runner and winner of two Olympic gold medals and three World Championships in the women's 800 metres. She first won gold at the World Championships in 2009 and went on to win at the 2016 Olympics and the 2017 World Championships, where she also won a bronze medal in the 1500 metres. After the doping disqualification of Mariya Savinova, she was also awarded gold medals for the 2011 World Championships and the 2012 Olympics.
Farkhod Tokhirov is a Tajikistani footballer who currently plays for Perak FA. He is a member of the Tajikistan national football team.
Zane Robertson is a New Zealand middle and long-distance runner. He won the bronze medal in the 5000 metres at the 2014 Commonwealth Games. Robertson is the Oceanian record holder for the 10 kilometres and half marathon, and New Zealand record holder for the marathon. He also holds the area best in the road 10 miles. He is currently serving an eight-year ban for breaching two World Athletics anti-doping rules.
The following table is an overview of national records in the 800 metres.
Tajikistan 
