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New research shows a nap a day could keep the doctor away by helping our brains stay sharp.
一项新研究表明，每天小睡一会儿可以帮助我们的大脑保持敏捷，从而让医生远离我们。
"We have this really strong belief in Western society that we shouldn't sleep during the day.
“在西方社会，我们坚信我们不应该在白天睡觉。
Having a sleep during the day is actually a pretty normal thing."
其实，在白天睡觉是一件很正常的事情。”
Researchers analyzed DNA samples and brain scans from 35,000 people between 40 and 69 years old.
研究人员分析了35000名年龄在40岁到69岁之间的人的DNA样本和脑部扫描。
They found nappers who took a short daytime snooze helped preserve the health of their brain as though it were 2.5 to 6.5 years younger.
他们发现，在白天小睡一会儿的人，有助于保持大脑健康，相当于让其年轻2.5岁到6.5岁。
"I think we are at this stage kind of scratching the surface of the role that sleep plays, generally in brain health and in particular with respect to dementia."
“我认为，我们目前对睡眠在大脑健康、尤其是痴呆症方面所起的作用，了解到的还只是皮毛。”
Some previous studies suggest a 5-15 minutes nap is the sweet spot, ideally by early afternoon or before,
之前的一些研究表明，5-15分钟的小睡是最佳时间，并且最好是在下午早些时候或下午之前，
so it doesn't interfere with the nighttime sleep routine.
这样就不会影响到夜间的睡眠规律。
"We might prioritize other aspects of health, like getting up early for the gym or looking at nutrition.
“我们可能会优先考虑健康的其他方面，比如早起去健身房，或者关注营养。
Sleep is really important, so don't necessarily sacrifice sleep over those other things."
但睡眠真的很重要，所以不要为了其他事情而牺牲睡眠。”
