Cycling is the use of bicycles, or - less commonly - unicycles, tricycles, quadricycles and other similar wheeled human powered vehicles (HPVs) as a means of transport, a form of recreation or a sport. It is done on roads and paths, across open country, through tunnels, over bridges, on snow, or even over ice (icebiking). As a sport, cycling is governed internationally by the Union Cycliste Internationale in Switzerland and by the International Human Powered Vehicle Association.
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