看太多的电视对孩子不好

Children as young as six are risking heart problems in later life because they are allowed to spend too much time watching TV or playing on computers, scientists warn.
科学家警告，6岁的孩子由于花太多时间看电视或玩电脑，将面临今后患上心脏病的风险。

A study of 1,492 primary school pupils found that those who spent hours glued to the screen suffered narrowing of blood vessels in their eyes – an early warning sign of increased  likelihood of heart disease and high blood pressure.
对1492名小学生进行的研究发现，那些长时间看电视的人眼睛血管收缩——这是可能患上心脏病和高血压的早期预示。

But those who exercised for one hour a day were significantly healthier.
然而那些每天锻炼一小时的人明显地比较健康。

The study was carried out by Dr Bamini Gopinath and a team of researchers at the University of Sydney.
这项研究是由悉尼大学Bamini Gopinath博士和一组研究人员进行的。

Parents answered a questionnaire detailing the amount of time their children spent watching TV, playing video games, reading and engaging in indoor and outdoor physical activity.
父母回答一份问卷说明他们孩子看电视，玩电子游戏，看书和进行室内室外体育活动的具体时间。

Scientists then took digital photographs of the blood vessels at the back of each child’s eye and calculated their size.
然后，科学家们从每个小孩眼睛的后面照出他们的血管并计算他们的大小。

They also measured height, weight, body mass index and blood pressure.
他们还测量了身高，体重，身体质量指数和血压。

They found on average, children spent 1.9 hours per day watching TV or playing on their computer and only 36 minutes doing physical activity.
他们发现，孩子每天平均花1.9小时看电视或玩电脑，36分钟运动。

They had an average ‘retinal arteriolar’ narrowing of 2.3 microns.
他们的“视网膜小动脉”平均收缩2.3微米。

But those who regularly participated in outdoor physical activity had retinal blood vessels that were 2.2 microns wider.
但是那些经常参加户外体育运动的人视网膜血管宽于2.2微米。

Dr Gopinath said that ‘replacing one hour a day of screen time with physical activity’ could be enough to stop the effects.
Gopinath博士说“每天用体育运动代替看电视的一个小时”就足以停止该影响。

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