作业帮谁能用英语介绍一下美式足球?
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谁能用英语介绍一下美式足球?
谁能用英语介绍一下美式足球?
谁能用英语介绍一下美式足球?
American Football is a tough contact sport that dominates the American sporting scene and is gaining popularity in Europe.It is a game requiring all-round physical fitness.Players have to be fast,strong,and proficient in the six basic skills of football:passing,catching,running,blocking,tackling,and kicking.American football has always been associated with a large number of injuries,not surprising when the game commonly involves players in excess of 240 pounds colliding with each other at full speed.In the United States,it is estimated that more than 300 000 high school players,35 000 college players,and half of the National Football League players are injured to some extent each season.Head and neck injuries are common:there are approximately 250 000 incidents of concussion each year.Some injuries have been fatal or have resulted in players becoming permanent quadriplegics.However,the number of very severe injuries has declined in recent years.This is probably due to rule changes concerning tackling and blocking with the head,and improvements in protective equipment which were introduced in 1976.There has also been a greater emphasis in training on strengthening the muscles of the neck and learning good tackling techniques.This is particularly important in the younger age group.