A bicycle is a two-wheeled vehicle that uses pedals and a crank to move forward, either by human power or powered by an engine. It is a popular mode of transportation, used for both leisurely rides and fast-paced races. Bicycles can carry a rider, one or more passengers, or cargo. They are available in a wide variety of styles and prices, and can be customized to fit the rider’s specifications.

Cycling is a low-impact, aerobic exercise that helps improve strength and stamina. It can be done at a low intensity, if needed, to recover from injury or illness, and can be built up to a demanding workout. Cycling can be a social activity, with many bike clubs and events providing opportunities to meet people. It is a cheap way to get around, with minimal environmental impact, and can be enjoyed by people of all ages and abilities.

It is the most efficient means of human-powered transport, in terms of the energy a person must expend to travel a given distance. Up to 99% of the energy inputted into the pedals is transferred to the wheels. This efficiency is largely due to the bicycle’s frame, fork, and drive system, which distributes the effort between the rider’s legs and hands. A bicycle can also be fitted with racks and fenders for carrying luggage.

Many modern bicycles use aluminum alloys for their structural components, as they offer a good balance of strength and weight. High-end bikes may be made from carbon fibre, which is significantly lighter than steel but offers even more stiffness. Other materials, such as titanium and magnesium, are sometimes used for specific parts.

Riding a bicycle requires balance, a strong core, and the ability to shift your weight to maintain control. Beginners should start off slow and work their way up to faster speeds, as it can be difficult to keep a bike upright at first. To prevent falling off, riders should focus on looking straight ahead, avoiding distractions.

Using the brakes on a bicycle can be tricky. It is important to apply the brakes evenly, and to avoid stopping too early. A sudden stop can cause the cyclist to lose control of the bicycle. To practice braking, a beginner can try riding down hills with their feet on the pedals while gliding.

The bicycle has been an important mode of transportation for centuries, and continues to be a common form of transport today. With the ever-increasing pressure on our planet, it is important that we find ways to reduce our dependence on cars and other forms of motorized transportation, and instead opt for greener alternatives such as the humble bicycle. This is why we need to do all that we can to support the cycling industry and encourage people of all ages and abilities to get on their bikes and go for a ride!