When people talk about having “too much of a good thing,” they usually mean overindulging
in something like cake or fast food — things you probably enjoy, even if they aren’t
that good for you.
But what about something that’s objectively important to your health and wellbeing, like
Well, it turns out that you can get too much of that, too.
大部分人每天需要7到8小时的睡眠 而嗜睡与很多的健康问题有关 例如情绪低下
Most people need 7-9 hours of sleep, and oversleeping is connected to health problems like depression,
heart disease, and diabetes.
A 2014 study of 894 pairs of twins, for example, showed that the genetic risk of depression
was higher in subjects who got less than 7 hours of sleep /or/ 9 or more hours of sleep
Meaning, people who underslept or overslept were more likely to be depressed because of
genetic factors, as opposed to environmental ones.
And according to a study on the sleep habits of 400,000 Taiwanese adults, the risk of coronary
heart disease is about the same in people who sleep less than 4 hours a night as it
is in those who sleep more than eight hours a night.
Subjects who underslept had a 35% higher risk of heart disease, and people who overslept
had a 34% increase.
2009年 一项调查花费了6年的时间跟踪了276名受试者 发现
Another study, published in 2009, followed 276 subjects for six years and found that
people who slept either less than 7 hours or more than 8 hours were at least twice as
likely to develop type 2 diabetes or trouble tolerating glucose.
A 2013 study of about 54,000 adults over the age of 44 found links between too much sleep
and increased rates of heart disease, diabetes, obesity, stroke, and mental health issues.
In fact, the rates of coronary heart disease, diabetes, and stroke were even higher in people
who overslept than in those who slept too little.
So, the links are there.
Sleep correlates with all kinds of health problems.
But it’s hard to say whether too much sleep actually /causes/ these issues.
It’s totally possible that oversleeping is actually a symptom of things like depression
or heart disease, or that there’s some other connection.
Either way, consistently sleeping too much might be a bad sign.
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