用英文表示写一片 My Favorite Transport
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用英文表示写一片 My Favorite Transport
用英文表示写一片 My Favorite Transport
用英文表示写一片 My Favorite Transport
Cycling is a means of transport,a form of recreation,and a sport.The bicycle carries riders across land,through tunnels,over bridges,snow,or,less frequently,over ice (icebiking).Cycling involves riding bicycles,unicycles,tricycles,quadricycles and other similar human powered vehicles
As a sport,cycling is governed internationally by the Union Cycliste Internationale in Switzerland (for upright bicycles) and by the International Human Powered Vehicle Association (for other HPVs,or human-powered vehicles).Cycling for transport and touring is promoted on a European level by the European Cyclists' Federation,with associated members from Great Britain,Japan and elsewhere.Regular conferences on cycling for transport are held under the auspices of Velo City; global conferences are coordinated by Velo Mondial.
Bicycles are commonly used by people seeking to improve their fitness and cardiovascular health.In this regard,bicycling is especially helpful for those with arthritis of the lower limbs and who are unable to pursue sports such as running that involve more impact to joints such as the knees.Furthermore,since cycling can be used as a form of transportation,there can be less demand for self-discipline to maintain the exercise because of the practical purpose of the activity.
Cycling while seated is a relatively non-weight bearing exercise that,like swimming,does little to promote bone density.[3] Cycling up and out of the saddle,on the other hand,does a better job by transferring more of the rider's body weight to the legs.However,excessive cycling while standing can cause knee damage.It used to be thought that cycling while standing was less energy efficient,but recent research has proven this not to be true.There is no wasted energy from cycling while standing.
开头结尾,加点自己的感情……