【英语时差8，16】头球危险吗？

 Is heading in soccer dangerous? It's a question that has met its fair share of controversy¹.   If you've never played soccer, heading may look pretty dangerous to the poor brain. Where else in life do you not want to duck away from an object flying straight at your head? However, soccer players know that there is a proper way to head the ball. Yes, there is a technique to meeting a flying ball with your head. And Dr. Frank Webbe, a former soccer referee² and coach who is also a psychologist specializing in sports psychology³, says there is good reason to believe that with proper technique, a player's risk for brain injury is low. The problem is that in a fast-paced game of soccer obstacles sometimes prevent a player from heading with good technique. And that's when problems are likely to arise.

Webbe and collaborators tested soccer players in neurocognitive performance such as attention, concentration, and speed of thinking. They compared long-time soccer players to novices⁴, as well as moderate-to-frequent headers to less than moderate headers. In addition, they tested people who had played soccer recently as well as people who hadn't played in some time. The results suggested that more frequent headers are at more risk for brain injury than less frequent headers. As a group, frequent headers performed lower on cognition tests in the week after a game of frequent heading than did other subjects. Also, players with the highest lifetime estimates of heading scored lowest overall on these cognition tests. The results convince Webbe that heading does indeed pose a threat to brain function and that more research needs to be done.  

1 controversy   

n.争论，辩论，争吵

参考例句：

• That is a fact beyond controversy.那是一个无可争论的事实。
• We ran the risk of becoming the butt of every controversy.我们要冒使自己在所有的纷争中都成为众矢之的的风险。

2 referee   

n.裁判员．仲裁人，代表人，鉴定人

参考例句：

• The team was left raging at the referee's decision.队员们对裁判员的裁决感到非常气愤。
• The referee blew a whistle at the end of the game.裁判在比赛结束时吹响了哨子。

3 psychology   

n.心理，心理学，心理状态

参考例句：

• She has a background in child psychology.她受过儿童心理学的教育。
• He studied philosophy and psychology at Cambridge.他在剑桥大学学习哲学和心理学。

4 novices   

n.新手( novice的名词复数 )；初学修士（或修女）；（修会等的）初学生；尚未赢过大赛的赛马

参考例句：

• The Russians are such novices in Africa. 在非洲的俄国人简直都是些毫无经验的生手。 来自辞典例句
• Where the primary track all novices, screams everywhere, ha ha good terror. 那里的初级道上全是生手，到处都是尖叫声，哈哈好恐怖的。 来自互联网