Kiiking is a sport and entertainment that emerged as an independent discipline in Estonia in 1996. The word "kiik" in Estonian means "swing", so the name of the sport itself can be translated as "swing" [1] .
As such, kiking was known in Estonia, as it is believed, from the turn of the 19th and 20th centuries [2] , where on a swing similar to those used in kicking, in contrast to other countries, this region was usually rocked in a standing position. Such a swing could be up to 2.5 m high; from 4 to 8 people swayed at a time. For many years, people tried to swing on such a swing “across the bar”, trying to take as high a height as possible, which, however, was a very risky activity without proper safety.
In 1996, the first swing for a kiiking was developed in Estonia, which completely eliminated the risk of injury due to a person falling during a swing, with an adjustable crossbar height [3] . In 1997, Ado Kosk received a patent for the swing he developed.
Modern swing for a kiiking have a height of 3-8 meters, mainly designed for swinging one person. Safety is provided by fastening the arms and legs on the swing with special belts [4] .
The principle of kiyaking is simple: a person stands on a swing straight when the swing is vertical, then squats to swing them. After the swings swing, the athlete again takes a straight position.
This sport is quite tedious and requires good preparation, mainly for the legs, because the main load during a person making circular revolutions on a swing, which is the task in this sport, falls on them.
An indicator of an athlete’s achievement is the height of the swing, at which they swing at least one full (i.e. 360 °) revolution. As of 2008, the world record is a full revolution, completed at an altitude of 7.02 m [5] .