偶看新闻绯色月下狂咲ノ绝原唱:The Big Sleep
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The Big Sleep
发布时间：2011-12-13文章出自：纽约时报原文链接：点击查看Q. Ever since childhood, I have needed more sleep than most. Why do some people need so much more sleep than others?
A. “There are two important aspects of sleep to be considered: quantity and quality, ” said Dr. Ana C. Krieger, medical director of the Center for Sleep Medicine at Weill Cornell Medical College.
Sleep duration, or quantity, varies widely and may be genetically determined, Dr. Krieger said. Some people are considered “long sleepers” and need to make sure they get enough sleep to function normally during the day. They may be prone to infections if lack of sleep interferes with the immune function.
In some instances, Dr. Krieger said, people appear to sleep longer, but the sleep is fragmented. In that case, an evaluation by a sleep expert is recommended.
With a condition present since childhood, Dr. Krieger said, “it is likely that your situation is that of a long sleeper” — a condition, shared by about 1 to 2 percent of the population, that is defined by a need for at least 10 hours of sleep at night.
If daytime sleepiness occurs despite sleeping more than 9 to 10 hours a night for at least a week, a sleep specialist may be helpful, she said. Dr. Krieger suggested that long sleepers try to add one or two hours of sleep each night during the week so that weekend catch-up sleep is not too long.
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