Rolling over and ignoring the alarm clock in the morning may seem harmless enough.

在床上翻来覆去，无视早晨闹钟的提醒，这一切似乎都是无害的。

But those lie-ins could be putting your health at risk.

但睡懒觉却会把你的青春置于风险中。

Sleeping more than eight hours a night significantly increases your chance of a stroke, research suggests.

研究显示，睡眠超过八小时，将会显著提升中风风险。

A study of nearly 290,000 people found seven to eight hours’ sleep a night may protect against the chance of a stroke.

一项近290000人参加的研究发现，每晚7-8小时的睡眠可能会预防中风。

But the US researchers, from the New York University School of Medicine, found that those who sleep for longer than this increase their risk of having a stroke by 146 percent.

但是纽约大学医学院的美国科学家发现，睡眠超过8小时的人，中风几率会增加146%。

And less than seven hours of sleep also increases the risk, by 22 percent.

睡眠少于6小时会增加22%的中风几率。

The academics, who presented their findings at the American Stroke Association Meeting in Los Angeles yesterday, analysed factors that contribute to the risk of strokes.

昨天，学者在位于洛杉矶的美国中风协会会议上展示了他们的成果，分析了影响中风风险的因素。

They took into account the health, lifestyle, age and ethnicity of 288,888 adults who took part in a survey from 2004 to 2013.

这项研究在2004年到2013年进行，共计288888名成人参与，研究者考虑了参与者的健康、生活方式、年龄和种族四方面情况。

The researchers also analysed how long people slept and how much exercise they took, such as walking, swimming, cycling or gardening.

研究者还分析了人们的睡眠时长，以及他们的锻炼时间，比如游泳，走路，骑自行车或者做园艺。

Sleeping seven to eight hours a night and taking 30 to 60 minutes of exercise three to six times a week gave the maximum benefits for stroke prevention.

每晚睡眠7-8小时，每周做3到6次30到60分钟的运动，最有利于预防中风。

Strokes occur either as a result of a bleed on the brain or when a clot cuts off the blood supply to part of the brain. Each year in England, about 110,000 people suffer a stroke.

当大脑出血或者有血凝块阻碍大脑某部分血液供应时，会发生中风。在英国，每年大约有110000人中风。

It the third most common cause of death, after heart disease and cancer. And brain injuries caused by strokes are a major cause of adult disability.

继心脏疾病和癌症后，这是第三大致命疾病。中风造成的大脑损伤是成人残疾的主要诱因。

Smoking, being overweight, not taking much exercise and a poor diet each raise the risk of stroke.

吸烟，超重，缺乏锻炼以及不良的饮食习惯都会增加中风的风险。