What are the Different Stages of Sleep?

The four stages stages of your sleep cycle

Have you ever woken up in the morning and just accepted today is going to be a right off, I just have to get through until this evening and then I can try this whole sleep thing again. We have, and we hate it. In this article we are focused on the late stage of sleep. This is the one that makes all the difference. Its the reason why an alarm clock, or the snooze button can ruin your rhythm before the day has begun.This is because of the final stage of your sleep process called REM sleep, where your brain becomes more active. Here are the different stages.


Stage 0 - Awake 

  • During a night's sleep, your body will wake up briefly throughout the night. This is completely normal 

Stage 1 - Light sleep 

  • This is a drowsy sleep stage where you can be easily woken up by outside stimulus. Your muscles relax and your brain activity slows also. It acts as a transition stage between sleep and wakefulness.

Stage 2 

  • This stage last about 20 minutes and is where you body starts to relax even more and allow you to become less aware of external stimuli.At this point your body temperature decreases, and your heart rate becomes more stable. This stage your brain also starts to consolidate its memories from the day before.

Stage 3 - Deep sleep 

  • During this stage your muscles relax and your blood pressure and breathing drop. This is one of your deepest stages of sleep where your brain produces slow deep brain waves known as delta waves.

Stage 4 - REM ( Rapid eye movement) 

  • Here your brain suddenly becomes more active, whilst your body becomes more relaxed and immobile. This is where dreaming occurs, which spikes an increase in your brain activity. The reason your body becomes immobile is to avoid you causing harm to yourself due to this activity spike.


Whilst we sleep, we don't go through these stages periodically. Our body begins in stage 1 and progresses into stage 2 and 3. Normally before stage 4 it will go back into stage 2 and will return to stage 2 after REM. On average we go through about 4-5 sleep stages in a night's sleep, spending almost 50 % of that time in stage 2 and only 20% in the REM stage. Each stage is necessary and helps important processes like memory consolidation and helps to clean up the brian from the day before.


Actionable info.
Try and wake up with the natural light and notice how different your energy levels feel the next day. Let us know how it goes Bubbles@BioOnics.com. We always like to chat.


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