In many cases the quality of sleep was more important that the quantity, he said.
Light and quality of sleep are well-known to be linked, as anyone who has ever pulled a night shift will attest.
It is possible to boost the quality of sleep by stimulating the right region of the brain with electricity during the night.
To account for the sleep variable, researchers in this study kept close tabs on the duration and quality of sleep of the participants.
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The younger patients getting loads of good quality sleep performed better on tests than their older colleagues who had worse quality sleep.
"It really can improve not only the quality of people's sleep but also reduce their chances of having mites and infestations of bedbugs, " she said.
Workers on night shifts generally get less sleep, and sleep of worse quality, than day workers.
The research team are now working on a simple questionnaire can be used to measure how sleep apnoea affects quality of life.
There's no need to worry about running out of power as the high quality lithium battery allows for over 100 hours of playing time with a rumble-disabled sleep mode to extend battery life, meaning gamers can battle until they are the last man standing.
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As one of the first studies to look into the role that diet plays on sleep quality, the findings are more hypothesis-generating than confirming.
That quality must have been severely tested when at the age of 14, he heard his father Meir screaming in his sleep, tormented by the horrors of the Holocaust.
Counterparties like Goldman Sachs, knowing it could use the bankruptcy laws to force AIG to sell high quality assets to pay off its gambling debts, played them like a Vegas card sharp never losing a minute of sleep worrying that the rube might go broke.
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