Early one Sunday morning, the shrill reverberating sound of my home phone woke me from a deep sleep.
They are designed to only wake you at the optimal time rather than when you are in a deep sleep.
The very moment that she felt the prick she sank down into the bed that was right there and fell into a deep sleep.
Many people use a float to wind down or to get over jet-lag -- as a deeply relaxing float has much in common with a deep sleep.
Now I have been teaching this for over seven years because I heard these words over 10 years ago in a yoga class that totally woke me up from a deep sleep of ignorance of what really is.
Lulled by the silence of the carriage and the prospect of alpine rail travel, I fall into a deep, childlike sleep.
It was not the best of facilities - my locker door was busted, the shallow pool was excessively chlorinated and there was nothing hot about the hot tub - but floating in a rooftop pool before getting on my flight capped off what was the most fun I have ever had in an airport and led to a deep, relaxed sleep on the plane.
Excessive alcohol consumption disrupts the 'REM' (Rapid Eye Movement) stage of deep sleep to ruin a night's rest, according to the UK Department of Health.
Total deep sleep decreases from nearly 20% of a normal nights sleep for those under 25 to less than 5% for those over 35.
First the team showed that they could use the state of a region of the brain, called the medial prefronal cortex, to predict how much deep, or slow-wave, sleep a person would have.
The researchers said that as deep sleep decreases so does growth hormone secretion and by the time a person is 35 it has fallen by about 75%.
When you need to take a break, close the lid and VAIO goes into an energy-efficient deep sleep, keeping your data stored safely for up to 90 days1 without running out of power.
ENGADGET: Sony announces its first Ultrabooks, the VAIO T13 and T11, for the European market
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