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What Happens During Non-REM Sleep? (5 mins read)


Belun Technology - December 22, 2021 - 0 comments

There are three phases of non-REM sleep. Each stage can last from 5 to 15 minutes. You go through all three phases before reaching REM sleep.

Stage 1: Your eyes are closed, but it’s easy to wake you up. This phase may last for 5 to 10 minutes.

Stage 2: You are in light sleep. Your heart rate slows, and your body temperature drops. So your body is getting ready for deep sleep. This can last for 10-25 minutes. That’s why a power nap best stop at stage 2 before the body goes deeper. See the story “is power nap good”.

Stages 3: This is the deep sleep stage. It’s harder to rouse you during this stage, and if someone woke you up, you would feel disoriented for a few minutes.

During the deep stages of NREM sleep, the body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.