Cycling, also called
bicycling or
biking, is the use of
bicycles for
transport,
recreation,
exercise or
sport. Persons engaged in cycling are referred to as "cyclists", "bikers", or less commonly, as "bicyclists". Apart from two-wheeled bicycles, "cycling" also includes the riding of
unicycles,
tricycles,
quadracycles, recumbent and similar
human-powered vehicles (HPVs).