The bicycle is the most efficient vehicle ever devised; a human on a bicycle is more efficient (in calories expended per kilo and per kilometer) than a train, truck, airplane, boat, car, or motorcycle. It is 3 times as efficient as walking. Cycling is the worlds biggest sports goods business worth approximately 51 billion dollars annually.

There are over 1 billion bicycles currently being used all around the world. Cycling as a popular pastime and competitive sport was established during late 19th century in England. Bicycles save over 238 million gallons of gas every year. Smallest bicycle ever made has wheels of the size of silver dollars.

Riding is easily mastered, and bikes can be ridden with little effort at 16–24 km (10–15 miles) per hour—about four to five times the pace of walking. The bicycle is the most efficient means yet devised to convert human energy into mobility. Bicycles are widely used for transportation, recreation, and sport (see cycling).

Riding bicycles, which is also called cycling, is an important way to travel in several parts of the world. The most popular type of cycling is Utility cycling. It is also a common recreation, a good form of low-impact exercise, and a popular sport. Road bicycle racing is the second most popular spectator sport in the world.

Cycling can help to protect you from serious diseases such as stroke, heart attack, some cancers, depression, diabetes, obesity and arthritis. Riding a bike is healthy, fun and a low-impact form of exercise for all ages. Cycling is easy to fit into your daily routine by riding to the shops, park, school or work.