Belarus competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's fifth appearance at the Summer Olympics in the post-Soviet era. The Belarus Olympic Committee sent a total of 151 athletes to the Games, 82 men and 69 women, to compete in 22 sports.
Hungary competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Hungarian athletes have competed at every Summer Olympic Games in the modern era, except the 1920 Summer Olympics in Antwerp, and the 1984 Summer Olympics in Los Angeles because of the Soviet boycott. The Hungarian Olympic Committee sent a total of 209 athletes to the Games, 119 men and 90 women, to compete in 20 sports. Water polo and handball were the only team-based sports in which Hungary had its representation in these Olympic Games. There was only a single competitor in road cycling and mountain biking.
Australia has sent athletes to all editions of the modern Olympic Games. Australia has competed in every Summer Olympic Games, as well as every Winter Olympics except 1924–32 and 1948. In 1908 and 1912 Australia competed with New Zealand under the name Australasia.
Sweden first participated at the Olympic Games at the inaugural 1896 Games, and has sent athletes to compete in every Games since then with one exception, the sparsely attended 1904 Summer Olympics. Sweden has earned medals at all Olympic games except for two, the 1896 Games and the 1904 Games. The only other nation having earned medals at every Olympic game since 1908 is Sweden's neighboring country Finland.
The United Kingdom has been represented at every modern Olympic Games, and as of the 2020 Summer Olympics is third in the all-time Summer Olympic medal table by both number of gold medals won and overall number of medals. London has hosted the Summer Olympic Games three times: in 1908, 1948, and 2012.
Greece has a long presence at the Olympic Games, as they have competed at every Summer Olympic Games, one of only five countries to have done so, and most of the Winter Olympic Games. Greece has hosted the Games twice, both in Athens. As the home of the Ancient Olympic Games it was a natural choice as host nation for the revival of the modern Olympic Games in 1896, while Greece has also hosted the 2004 Summer Olympics. During the parade of nations at the opening ceremony of the Olympic Games, Greece always enters the stadium first and leads the parade to honor its status as the birthplace of the Olympics, with the notable exception of 2004 when Greece entered last as the host nation. Before the Games the Olympic Flame is lit in Olympia, the site of the Ancient Olympic Games, in a ceremony that reflects ancient Greek rituals and initiates the Olympic torch relay. The flag of Greece is always hoisted in the closing ceremony, along with the flags of the current and the next host country.
Denmark first participated at the Olympic Games at the inaugural 1896 Games, and has sent athletes to compete in every Summer Olympic Games since then, except for the sparsely attended 1904 Games. Denmark has also participated in the Winter Olympic Games several times since 1948, including every Games since 1988.
Canada has competed at 23 Summer Olympic Games, missing only the inaugural 1896 Summer Olympics and the boycotted 1980 Summer Olympics. The nation made its debut at the 1900 Summer Olympics. Canada competes under the IOC country code CAN.
The all-time medal table for all Olympic Games from 1896 to 2022, including Summer Olympic Games, Winter Olympic Games, and a combined total of both, is tabulated below. These Olympic medal counts do not include the 1906 Intercalated Games which are no longer recognized by the International Olympic Committee (IOC) as official Games. The IOC itself does not publish all-time tables, and publishes unofficial tables only per single Games. This table was thus compiled by adding up single entries from the IOC database.
Competitors at the Olympic Games have used banned athletic performance-enhancing drugs.
Athletics at the 2008 Summer Olympics were held during the last ten days of the games, from August 15 to August 24, 2008, at the Beijing National Stadium. The Olympic sport of athletics is split into four distinct sets of events: track and field events, road running events, and racewalking events.
Ludger Beerbaum is an internationally successful German equestrian who competes in show jumping and has been ranked the No. 1 Show Jumper in the world by the FEI on multiple occasions. He is also a four-time Olympic Gold medalist team and individual.
Colombia first formally participated at the Olympic Games in 1932, and has sent athletes to compete in all but one edition of the Summer Olympic Games since then, missing only the 1952 Games. Colombian athletes have won a total of 34 Olympic medals in eight different sports, with weightlifting and cycling as the most successful ones. Colombia is the third most successful South American country at the Olympic Games, after Brazil and Argentina respectively. The Colombian Olympic Committee was created in 1936 and recognised by the International Olympic Committee in 1948.
Great Britain, represented by the British Olympic Association (BOA), competed at the 2008 Summer Olympics in Beijing, China. The United Kingdom was represented by the British Olympic Association (BOA), and the team of selected athletes was officially known as Team GB. Britain is one of only five NOCs to have competed in every modern Summer Olympic Games since 1896. The delegation of 547 people included 311 competitors – 168 men, 143 women – and 236 officials. The team was made up of athletes from the whole United Kingdom including Northern Ireland. Additionally some British overseas territories compete separately from Britain in Olympic competition.
The men's road race, a part of the cycling events at the 2008 Summer Olympics, took place on August 9 at the Urban Road Cycling Course in Beijing. It started at 11:00 China Standard Time (UTC+8), and was scheduled to last until 17:30 later that day. The 245.4-kilometre (152.5 mi) course ran north across the heart of the Beijing metropolitan area, passing such landmarks as the Temple of Heaven, the Great Hall of the People, Tiananmen Square and the Beijing National Stadium. After rolling over relatively flat terrain for 78.8 km (49.0 mi) north of the Beijing city center, the route entered a decisive circuit encompassing seven loops on a 23.8 km (14.8 mi) section up and down the Badaling Pass, including ramps as steep as a 10 percent gradient.
The European Track Cycling Championships are a set of elite level competition events held annually for the various disciplines and distances in track cycling, exclusively for European cyclists, and regulated by the European Cycling Union (UEC). They were first held in their current format in 2010, when elite level cyclists competed for the first time following an overhaul of European track cycling.
Kazakhstan competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's fifth appearance at the Summer Olympics in the post-Soviet era.
Brett Aitken 
Etienne De Wilde 
Silvio Martinello 
Franco Marvulli 
Rob Hayles 
Juan Curuchet 
Joan Llaneras 
Mikhail Ignatiev 
Lasse Norman Hansen 
Donavan Grondin 
Australia 
Venezuela 
Great Britain 
