We spend 1/3 of our entire life sleeping. Good sleep quality is (A) vital to our health and productivity. But come on, (1) haven’t we heard it all before. The point is how many hours of sleep leads to the highest performance and quality of life? Let's see what the study has to say.
The results from one study show that (B) subjects who were allowed to sleep eight hours per night had the highest performance on average. Subjects who slept only four hours a night did worse each day. The group who got six hours of sleep seemed to (2) hang in there, until around day 10 of the study. After they slept six hours per day, for two weeks, they performed as poorly as those who were forced to keep their eyes open for two days straight.
The thing is that we have no idea how much time we actually spend in bed. A sleep study published in Epidemiology, shows people generally (C) overestimate their sleep by around 0.8 hours. In fact, you don't sleep as much as you think!
Getting enough sleep is (3) easier said than done, but the following experts' advice probably gives us some food for thought: Have a consistent bedtime; don't look at electronic screens at least 30 minutes before bed, drink less, and get enough exercise.
1. We've heard it all before. 老生常談
A. I promise I'll get up early tomorrow. 我保證明天一定會早起。
B. Yawn, we've heard it all before. 拜託！聽你說過一百遍了。
2. Hang in there. 撐得住
Don't worry. I am not drunk. I can still hang in there.
3. Easier said than done 知易行難
A: I am going to read a book a week.
B: Easier said than done. Why don’t you start with a book a month?