1. Although the dangers of too little
sleep are widely known, new research suggests that people who sleep too much may
also suffer the consequences. 2. Investigators at the
University of California in San Diego found that people who clock up 9 or 10
hours each weeknight appear to have more trouble falling and staying asleep, as
well as a number of other sleep problems, than people who sleep 8 hours a night.
People who slept only 7 hours each night also said they had more trouble falling
asleep and feeling refreshed after a night's sleep than 8-hour
sleepers. 3. These findings, which DL Daniel Kripke reported in
the journal Psychosomatic Medicine, demonstrate that people who want to get a
good night's rest may not need to set aside more than 8 hours a night. He added
that "it might be a good idea" for people who sleep more than 8 hours each night
to consider reducing the amount of time they spend in bed, but cautioned that
more research is needed to confirm this. 4. Previous studies
have shown the potential dangers of chronic shortages of sleep—for instance, one
report demonstrated that people who habitually sleep less than 7 hours each
night have a higher risk of dying within a fixed period than people who sleep
more. 5. For the current report, Kripke reviewed the responses
of 1,004 adults to sleep questionnaires, in which participants indicated how
much they slept during the week and whether they experienced any sleep problems.
Sleep problems included waking in the middle of the night, arising early in the
morning and being unable to fall back to sleep, and having fatigue interfere
with day-to-day functioning. 6. Kripke found that people who
slept between 9 and 10 hours each night were more likely to report experiencing
each sleep problem than people who slept 8 hours. In an interview, Kripke noted
that long sleepers may struggle to get rest at night simply because they spend
too much time in bed. As evidence, he added that one way to help insomnia is to
spend less time in bed. "It stands to reason that if a person spends too long a
time in bed, then they'll spend a higher percentage of time awake," he said.
A. Kripke's Research Tool B. Dangers of
Habitual Shortages of Sleep C. Criticism on Kripke's
Report D. A Way of Overcoming Insomnia E.
Sleep Problems of Long and Short Sleepers F. Classification of
Sleep Problems
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Paragraph 2 ______
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Paragraph 4 ______
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Paragraph 5 ______
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Paragraph 6 ______
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A. fall asleep again
B. become more energetic the following day
C. sleep less than 7 hours
D. confirm those serious consequences
E. suffer sleep problems
F. sleep more than 8 hours
To get a good night's rest, people may not need to ______.
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Long sleepers are reported to be more likely to ______.
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One of the sleep problems is waking in the middle of the night, unable to ______.
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One survey showed that people who habitually ______ each night have a higher risk of dying.