Perhaps the most famous of sleep cycles, REM sleep is interesting and almost science fiction material. REM sleep further delves into brain recovery, sleep, and processing memories and emotions. Experts have recommended that adults sleep between 7 and 9 hours a night. New research aims to identify not only the total amount of sleep you need, but also the amount of each stage of sleep you need.
Slow wave sleep, also called deep sleep, is an important stage in the sleep cycle that allows for adequate brain function and memory. While most adults are aware that they should aim for 7-9 hours of sleep each night, the science of sleep is quite complex. There are five stages of sleep that range from non-rapid eye movement (NREM) to rapid eye movement (REM) and include sleepiness, light sleep, moderate to deep sleep, deep sleep, and sleep. Because deep sleep plays an important role in memory, the body may struggle to create new memories or retain information if it doesn't get enough sleep.
There are four stages of sleep; one for rapid eye movement (REM) sleep and three that form non-REM sleep (NREM). Last night, I woke up around 4 o'clock and couldn't go back to sleep until after 6 and even then my sleep was light. While the time you spend at each stage varies the longer you sleep, and you may jump between stages each night, each individual stage remains pretty much the same. The division of a person's sleep into several cycles and stages is commonly referred to as sleep architecture.
In addition to marking the beginning of your sleep period, stage 1 sleep also occurs between each later stage of sleep. It effectively eliminates the accumulated need for sleep that accumulates during a normal waking day, and can play an important role in helping to clear the brain for new learning the next day. I was told (proved to be true) that the Fitbit should be a little tight - if it is loose, it may not track the heart rate during sleep, which is how the data is calculated. Aging is also linked to shorter sleep periods, although studies show that you still need to sleep as much as when you were younger.
I can't figure out how to make REM, deep sleep, light sleep, and wakefulness patterns reappear in my sleep report. A key step is to focus on improving sleep hygiene, which refers to your sleep environment (the best mattress, the best pillows or sheets, etc.