Children who engage in daily physical exercise reap the health benefits as early as their teens. The study of 4600 children found those who were more active in late childhood had a lower body weight and lower risk factors for cardiovascular disease and diabetes by their mid-teens. University of Sydney researcher Emmanuel Stamatakis said the results demonstrated the importance of exercise for children.

Associate Professor Stamatakis said, "We want children to be active, not so much so they don't get chronic disease as children, but we want them to be active for health in their adult life because that is when chronic disease happens."

Encouraging physical activity in children would require a national approach that involved various government agencies working together. "The health sector needs to talk to the education sector and perhaps the sports sector as well," he said. "The problem of chronic disease cannot be solved by one or two measures."

Each child was asked to wear a motion sensor for seven consecutive days during waking hours at the age of 11, when measurements and blood samples were taken. They were measured and tested again at the age of 15, and the results were controlled for genetics, diet and other health risk factors.

Those who engaged in at least 60 minutes of moderate to vigorous exercise each day at age 11 had better health, less body fat and a reduced risk of diabetes at age 15. Associate Professor Stamatakis said these least active children may suffer from poorer health in adulthood.

Obesity Australia executive director Stephen Simpson said a combination of measures to encourage physical activity would be effective. These could include "walking buses" to school." You could come up with endless things, but what you want is to put them together and get a community change," Professor Simpson said.

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1. What is the best title of the passage?

A Active children become healthier teens

B Everyone should have a low body weight

C Children should take important exercises

D Daily physical exercise will be cut down

解析：选A。A。文章标题判断题。根据文章第1段第1句的Children who engage in daily physical exercise reap the health benefits as early as their teens可以得知活泼好动的孩子会更加健康。

2.What is the benefit of daily physical exercise according to Professor Stamatakis?

A They will be protected from chronic disease.

B They will do well in their school performance.

C They will be very happy during their adult life.

D They will solve many national problem easily.

解析：选A。A。细节理解题。根据文章第2段最后1句的but we want them to be active for health in their adult life because that is when chronic disease happens可以得知小时候的体育锻炼能够预防患上一些慢性病。

3.Which of following was not the factor that affects the children’s health?

A The genetics.

B The diet.

C The exercises.

D The appearance.

解析：选D。D。细节理解题。根据文章第4段最后一句的and the results were controlled for genetics, diet and other health risk factors可知没有提到外表会影响孩子的健康。

4.What is the purpose of having each child wearing a motion sensor?

A To get the blood sample.

B To measure the amount of movement.

C To prove the result is right.

D To test again in the experiment.

解析：选B。B。推理他判断题。根据第4段第1句的when measurements and blood samples were taken可以得知佩戴运动传感器就是为了测量孩子的运动量。

5.Why do people encourage "walking buses"?

A Because people want to encourage physical activity.

B Because people want to put all the students together.

C Because people do not want to suffer from the illness.

D Because people think it is a combination measure.

解析：选A。A。推理判断题。根据文章最后一段第1句的Obesity Australia executive director Stephen Simpson said a combination of measures to encourage physical activity would be effective可知，他们想办法来促进学生的运动。