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Always work on the knowledge on how you feel the next day after being asleep — if you wake feeling refreshed and ready to tackle, chances are you are sleeping just fine. When we first fall asleep we enter non-rapid eye movement sleep NREM. This is divided into three stages, with each becoming progressively deeper.
NREM3 becomes deeper, and if woken up, we can feel disorientated. Following on from this is rapid eye movement sleep REM , the stage at which we dream. Each sleep cycle lasts around one and a half hours, and in order to feel fully rested and refreshed when we wake up, we must experience all four stages. If you feel like four cycles is too little six hours of sleep but five cycles is too much 7.
These two stages will last no more than 30 minutes altogether. National Sleep Helpline: But other findings suggest that the type of sleep we get is more important than the duration of our sleep.
When we sleep, our body goes through five specific stages as noted by he National Institute of Neurological Disorders and Stroke. Each stage accumulates to REM rapid eye movement sleep, and then restarts, completing one cycle. The first stage through REM takes about 90 minutes to complete, and adults typically need to complete at least four or five sleep cycles per night, or 6 to 9 total hours of sleep. Stage 1. Stage 1 of the sleep cycle is considered light sleep.
When in stage 1, sleepers drift in and out of sleep, easily awakened. Physically, sleepers eyes and muscle activity slows down, but may experience muscle contractions. Hypnic myoclonia is the proper term for this, and is often described as a falling sensation sleepers get when sleeping. When awakened during stage 1 sleep, most people are unable to remember simple things. Stage 2.
In stage 2, your body drifts deeper into sleep as your eyes stop moving and your brain activity slows. However, your brain will still have occasional bursts of sleep spindles, or small bursts of rapid brain waves. Stage 3. Sleep cycles across the night are only approximately 90 minutes in length. There are lots of individual differences in cycle length and the variation may be from around 60 to minutes.
There may also be unpredictable differences in the same individual from night to night. It can be hard to predict how long it takes to go to sleep. The same person may take quite different times to fall asleep on different nights and different people take different lengths of time.
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