游泳运动中的蝶泳的得名是因为:

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Water is the source of life, close-water exercises are naturally more favoured by people, and swimming is one of them. It is truly a sort of pleasing enjoyment to immerse one's body in the nice and cool blue water during the scorching summer days.
Swimming is divided into breaststroke,freestyle,backstroke, and butterfly stroke.
Swimming has the following benefits: Firstly, its function of strengthening the cardiac muscle.Energy sissipation increses while swimming, blood circulation is also accelerated, the load of the heart would be increased in this way, one would have a strong heart as the result of swimming over a long period of time. Strengthening one's resistance power comes next.people who aften take part in winter swim thus would not catch a cold easily, due to the improved body temperature adjustment function.Swimming could even have the function of weight reducing. While in the water,due to the resistance force, people's energy consumption increasses as a result. Experiment has proved that: for a duration of 20 minutes'exercise in a standard swimming pool, a person's consumption of calories is corresponding to that of an hour on land.
Other than the benefits that this type of execrise could bring, the star effect also cannot be ignored. Michael Phelps won 8 gold medals in the swimming events with one stroke during the Beijing Olympic Games, and created a miracle. His heroic act has attracted even more people to devote themselves to swimming.
Seaside cities have an exceptional advantage,the white beaches and sky-blue seas hace created for swimming lovers a fabulous condition.

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