Cycling, also called biking or bicycling, is the use of bicycles for transport, recreation, exercise or sport. People engaged in cycling are referred to as “cyclists”, “bikers”, or less commonly, as “bicyclists”. Cycling, also called biking or bicycling, is the use of bicycles for transport, recreation, exercise or sport. People engaged in cycling are referred to as “cyclists”, “bikers”, or less commonly, as “bicyclists”