Para-cycling (or para-cycling) is a sport derived from cycling. Bicycle prototypes date back to the early 20th century, the bicycle for the physically disabled dates back to the 1960s, the tandem practiced by the visually impaired in the 1970s and finally the handbike for wheelchair users in the 1990s. Competitive cycling consists of two disciplines: road cycling and track cycling. Road cycling is practiced outdoors and track cycling in a velodrome.