Stage I: falling asleep
The body gradually relaxes. This is supported by darkness, a conscious closing of the eyes and even breathing. The eyes are still active and the muscle tension is high. Even quiet sounds we hear. Our body temperature is still normal, in deep sleep, the body temperature lowers by about 1.5 degrees.
After a few minutes the sleep stage begins. We can not actively remember the moment of falling asleep. A healthy sleeping person spends an average of 10 percent of the night in the state of waking and in the state of falling asleep.
Stage II: The light sleep
After the falling asleep, we glide into a phase of light sleep. The eye movements come to a standstill and the muscle tension decreases significantly. The consciousness nevertheless registers what happens in the environment. Mild disturbances are often enough to startle us. Happens this we have the impression not to have slept. This is especially true for people with sleep disorders. Here it has been shown that women benefit from their own bedroom. They wake up less often here than in a double bed.
Stage III: Deep sleep
In undisturbed sleep we glide from light sleep to deep sleep. The eyeballs are now completely calm and the muscles completely relaxed. The body functions run in regeneration mode. The immune system is working at full speed. Blood pressure and body temperature drop, respiration and heart rate slow down. We hardly react to sounds at this stage, but the consciousness is not completely deactivated (eg: nursing sleep). The immune system is activated during this phase and releases growth hormones. That is why children often grow up at night and often complain of leg pain in the morning.
Stage IV: REM sleep (dream sleep)
This phase is very different from the previous phases: The eyes move quickly and large parts of the muscles are blocked. The sleeper is in a “sleep paralysis”. This serves to protect the sleeper, not to actually implement his dreamed movements. The first REM phase begins about 60 minutes after falling asleep. Immediately before the deep sleep phase ends. We dream and our brain is highly active and processes the information of the day. The learned and heard are evaluated, analyzed, structured and recorded in our memory database.
What does a restful sleep profile look like?
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