4.The measure of a good night's sleep is usually based on two things—the amount of time spent sleeping and the quality of that sleep.But now researchers say there is a third thing that matters even more than the other two when it comes to keeping good sleep habits,and that is having a regular bedtime.
A study has found that going to sleep and waking up at the same time every day have an important effect on one's health.Adults who stick to a regular bedtime tend to weigh less,have lower blood sugar and reduced risk of heart disease.
The researchers studied the sleeping habits of 2,000 adults with an average age of 69.They found that people with greater irregularity (無規(guī)律) in their sleep patterns tended to go to sleep later at night,feel sleepy and sleep more during the day,and experienced reduced light exposure.These people were also more likely to be stressed.Among the three kinds of sleep problems,sleep regularity was the most strongly associated with health.
Of course,there are many people for whom this may be impossible,such as night-shift workers or those with late-night duty.But for those who don't have mandatory (強制的) reasons to stay up late,they should make an effort to go to bed at the same time every night.Skip the late afternoon coffee.Get off the phone.Try this calculator to figure out the best bedtime.
As Matthew Walker,a scientist,wrote, "The shorter your sleep,the shorter your life." Surely that's reasonable enough to go to bed on time.
(1)What can we infer from the research?
A.People feel more stressed when they grow older.
B.The old often have less sleep.
C.Adults enjoy sleeping late.
D.Regular bedtime does good to our health.
(2)Which of the following influences health most?
A.Reduced light exposure.
B.Sleep regularity.
C.Sleeping during the day.
D.Sleeping later at night.
(3)According to the author,those who don't have to stay up late should
.
A.Avoid the late-night duty.
B.Skip the late-night coffee.
C.Get off the phone while working.
D.Try to sleep at the same time each night.
(4)What's the best title for the text?
A.The Importance of Sleep
B.Ways to Have a Good Sleep
C.Regular Bedtime for Your Health
D.The Suitable Time for Sleep