Young Adults Who Exercise Get Higher IQ Scores
Young adults who are fit have a higher IQ 1 and are more （1） to go on to university，reveals a major new study2 carried out at the Sahlgrenska Academy3 and Sahlgrenska University Hospital.
The results were recently published in the Proceedings of the National Academy of Sciences (PNAS)4.The study involved 1.2 million Swedish men doing military service who were born between 1950 and 1976.The research group analysed the （2 ）of both physical and IQ tests the youngsters took right after they started serving the army.
The study shows a clear link （3） good physical fitness and better results for the IQ test.The strongest links are for （4） thinking and verbal comprehension.But it is only fitness that plays a （5） in the results for the IQ test5，and not strength.“Being fit means that you also have good heart and lung （6） and that your brain gets plenty of （7） ，"says Michael Nilsson，professor at the Sahlgrenska Academy and chief physician at the Sahlgrenska University Hospital.“This may be one of the reasons （8 ）we can see a clear link with fitness，but not with muscular （9 ）.We are also seeing that there are growth factors that are important.”
By analysing data for twins，the researchers have been （10 ）to determine that it is primarily environmental factors and not genes that explain the link between fitness and a （11 ）IQ.
“We have also shown that those youngsters who （12） their physical fitness between the ages of 15 and 18 increase their cognitive performance，”says Mafia Aberg，researcher at the Sahlgrenska Academy and physician at Aby health centre.“This being the case6 ，physical （13） is a subject that has an important place in schools，and is an absolute must7 if we want to do well in maths and other theoretical subjects."
The researchers have also compared the results from fitness tests （14 ）national service8 with the socio-economic status of the men later in （15 ）.Those who were fit at 18 were more likely to go into higher education，and many secured more qualified jobs.
词汇：
proceedings n.学报，论文集 Swedish adj.瑞典的
comprehension n.理解 muscular adj.肌肉的
注释：
1.IQ：智商。IQ是intelligence quotient的缩写。
2.reveals a major new study：一项主要的新研究显示。这是一个倒装句，主语是a major new study，谓语是reveals。第三段出现的“says Michael Nilsson”和第五段出现的“says Maria
Aberg"也是同一类型的倒装句。
3.Sahlgrenska Academy：瑞典哥德堡大学健康科学研究院
4.the Proceedings of the National Academy of Sciences(PNAS)：美国国家科学院学报
5.But it is only fitness that plays a role in the results for the IQ test：“it is...that"是强调式句子结构，被强调的部分是only fitness。强调前的句子是："But only fitness plays a role in the results for the IQ test."。第四段中出现的“it is primarily environmental factors and not genes that explain the link between fitness…”那个句子也属强调式句子结构。
6.This being the case：倘若情况果真如此，因此
7.must：用作名词，意思是“必须”。
8.national service：兵役，国民服役
