Kiiking is a sport that was invented in Estonia

Estonia

Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

 by Ado Kosk around 1996. In Estonian language

Estonian language

Estonian is the official language of Estonia, spoken by about 1.1 million people in Estonia and tens of thousands in various émigré communities...

 kiik means a swing

Swing (seat)

A swing is a hanging seat, usually found at playgrounds for children, a circus for acrobats, or on a porch for relaxing. The seat of a swing may be suspended from chains or ropes. Once a swing is in motion it continues to oscillate like a pendulum until external interference or drag brings it to a...

. In a kiiking swing, the swing arms are made of steel to enable a person to swing 360 degrees going over the spindle of the swing . A person is fastened to the swing base by their feet. To swing the person begins to pump by squatting and standing up on the swing. The swing will gain momentum and will by skillful pumping take a person across the spindle.

Ado Kosk observed that it is more difficult to get across a spindle the longer the swing arms. He then designed and patented telescoping swing arms to gradually extend the arms for an increased challenge.