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During the recommended seven to nine hours of sleep, we typically go through three to five sleep cycles per night, with the duration of REM sleep getting longer each subsequent time, Varga explains.
The finding comes from a 2013 study ... maintenance insomnia occurs when you wake up in the middle of the night but are able to go back to sleep; and late insomnia is waking up too early and being ...
If you wake up achey and uncomfortable, the culprit might be your sleep position. Learn the pros and cons of the most common options, whether you sleep on your back, side or stomach.
A Canadian survey found that 39% of respondents preferring the "log" position (lying on one's side with the arms down the side) and 28% preferring to sleep on their side with their legs bent. [1] A Travelodge survey found that 50% of heterosexual British couples prefer sleeping back-to-back, either not touching (27%) or touching (23%).
Can you really get by with just 6 hours of sleep a night? Here's what to know and how to get more sleep.
My sleep posture is far from ideal, since a large body of science concludes that sleeping on your stomach puts pressure on the respiratory system, nerves, ribcage, and spine, all while increasing ...
Sleep inertia is a physiological state of impaired cognitive and sensory-motor performance that is present immediately after awakening. It persists during the transition of sleep to wakefulness, where an individual will experience feelings of drowsiness, disorientation and a decline in motor dexterity.
Sleep deprivation was also found to increase beliefs of being correct, especially if they were wrong. Another study reported that the performance on free recall of a list of nouns is significantly worse when sleep deprived (an average of 2.8 ± 2 words) compared to having a normal night of sleep (4.7 ± 4 words).