2021届100所名校高考模拟金典卷·英语六 21·JD·英语-N

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The negative health effects of being
economical on sleep during the week can't be reversed by marathon weekend sleep
sessions, according to a new study.

Researchers have long known that routine
sleep lack can cause weight gain and increase other health risks, including
diabetes. But those who force themselves out of bed sleepy each weekday after
too few hours of shut-eyed, hope that shutting off the alarm on Saturday and
Sunday will repay the weekly sleep debt and compensate any ill effects.

The research, published in Current Biology,
crushes those hopes. Despite complete freedom to sleep in and nap during a
weekend recovery period, participants in a sleep laboratory who were limited to
five hours of sleep on weekdays gained nearly three pounds over two weeks and
experienced metabolic disruption (新陈代谢紊乱)that
would increase their risk for diabetes over the long term. While weekend
recovery sleep had some benefits after a single week of insufficient sleep,
those gains were wiped out when people plunged back into their same
sleep-deprived (剥夺) schedule the next Monday.