IOC International Olympic Committee (IOC or) separates distance swimming in two varieties: open and closed in the water, in other words, swimming in the sea or in the pool.
Swimming in open water, or the marathon, was included in the competition program only recently, in 2008 in Beijing.This heat is carried out at 10 km.It is the longest distance in open water.
Swimming in the pool is a traditional discipline, and the longest distance in this area - 1500 m freestyle.
Russian-speaking official classification calls diving water sports, the term "floating" is not used.
Competitions in the pool
International competitions are held only in the pools, the length of which is usually 50 or 10
0 m. Due to the fact that athletes often changes direction, its speed of passage of the same distance is often a bit higher than ifhe sailed on a length of the section without making turns.Related to this are several problems with the fixation speed records.
In 1908 it was decided that capture records only in a length of the pool than the Olympics, so the game is not set records in swimming.But in 1956 this decision was revised, and now records can be put only in pools 50 and 55 meters long.Since 1957 registration records was started again.Between 1988 and 1993 this decision was revised again, and now you can set records in the 25-meter pool.
Swimming in open water
distance of 10 km at sea is considered to be ultra-long.Once it has been given single-experimenters, and now swims long distances were held en masse.
beginning of the story ultra-long distance swimming in the XIX century, when the Briton Matthew Webb overcame Bay Channel swim in 1975.To do this, it took 21 hours and 45 minutes.
competitions in open water have been included in the World Swimming Championships in 1991.And now every even year since 2000, held the world championships in swimming in open water at a distance of 5, 10 and 25 km.But the longest Olympic distance open water swimming is that is 10 km away.