The bad health effects of sleep loss during the week can't be repaid by longer weekend sleep,according to a new study.
Researchers have long known that sleep deprivation(剝奪)can cause weight gain and increase other health risks.But for those who force themselves out of bed every weekday after too few hours of shuteye,they hope turning off the alarm on Saturday and Sunday will repay the weekly sleep debt and remove any ill effects.
The research,published in Current Biology,crushes those hopes.Despite complete freedom to sleep during a weekend recovery period,people in a sleep lab who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks and experienced disorders that would increase their risk for diabetes over the long term.While weekend recovery sleep had some benefits after a single week of sleep loss,those gains were wiped out when people fell right back into their same sleep-deprived schedule the next Monday.
"If there are benefits of catch-up sleep,they're gone when you go back to your daily schedule.It's very short lived," said Kenneth Wright,director of the sleep and chronobiology lab at the University of Colorado at Boulder. "These health effects are long term.It's kind of like smoking once was — people would smoke and wouldn't see an immediate effect on their health,but people will say now that smoking is not a healthy lifestyle choice.I think sleep is in the early stage of where smoking used to be."
Wright said that the study suggests people should put sleep in the first place cutting out the "sleep stealers" such as watching television shows or spending time on their phones.Even when people don't have a choice about losing sleep because of child-care responsibilities or job schedules,they should think about getting sleep in the same way they would get a healthy diet or exercise.
(1)What does the underlined word "crushes" mean? AA
A.Ruins.
B.Guarantees.
C.Deepens.
D.Arouses.
(2)What will Kenneth Wright agree with? DD
A.Smoking is more harmful than sleep loss.
B.Weekend recovery sleep has many benefits.
C.Smoking and sleep loss have the same bad effects.
D.It takes long for people to see the effects of sleep loss.
(3)What does Kenneth Wright advise people to do? BB
A.Take regular exercise every day.
B.Reduce the screen time before sleep.
C.Watch some TV shows before bedtime.
D.Sleep as long as possible during weekdays.
(4)What is the main purpose of this passage? DD
A.To share some unhappy experiences.
B.To show some unknown facts.
C.To promote a healthy lifestyle.
D.To introduce a new study.
【答案】A;D;B;D
【解答】
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發(fā)布:2024/5/27 14:0:0組卷:1引用:1難度:0.7
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