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Age isn't just a number when determining optimal sleep duration. It's also not the only factor, but it's an important one. ... that a lack of sleep leads to challenges with focus, memory and ...
All of this leads to poor-quality sleep and the need for more than the baseline for your age. It’s not necessary to move out of the city or ditch your electronics to recalibrate your internal clock.
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.
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.
Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic , bifurcated , or bimodal ) sleep refers to two periods, while polyphasic usually means more than two. [ 1 ]
Can you really get by with just 6 hours of sleep a night? Here's what to know and how to get more sleep.
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).
Most adults who sleep the recommended seven to nine hours a night get roughly one to two hours of REM sleep. So, REM sleep should account for about 25 percent of your total sleep time.