Cycling, also commonly referred to as biking or bicycling, is a form of physical activity in which one uses a bicycle to move from one place to another. Cycling can be done for recreational or competitive purposes, for commuting, or even just for the sake of exercise. Bicycles were first invented in 1817 and have since remained one of the most popular modes of transportation across the world. This is largely in part due to their cost-effectiveness and efficiency, particularly for shorter commutes. As a sport, there are three main categories of cycling: road racing, track racing, and cyclocross.
'Popularity' is determined by the average monthly online search statistics for each category or element