Why do we need to sleep? No one can give a perfect answer. However, tests show that lack of sleep for four weeks in a row will lead to a strong drop in human body temperature, weight loss, and eventually lead to disease. 、
Different people need different sleep time, and eight hours is considered as the average sleep time needed. Doctors suggest that the minimum sleep time for teenagers is ten hours for primary school students, nine hours for junior high school students and eight hours for senior high school students.
Some people sleep little at night, but they look fine. American scientist Thomas Edison said that sleeping is a waste of time. However, doze off during the day. On the contrary, another great scientist, Albert Einstein, said that he needed at least ten hours' sleep at night.
Here are some good suggestions for a good sleep.
Sleep at the same time every day.
The bed is only for sleeping.
Don't do sports at night.
Keep the bedroom dark and quiet while sleeping.
Drink a glass of milk before going to bed.
Never look at your watch when you can't sleep!