> For the complete documentation index, see [llms.txt](https://slp.gitbook.io/sleepass-app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://slp.gitbook.io/sleepass-app/sleep/stages.md).

# 睡眠ステージ

### :red\_circle:**覚醒**

睡眠に入るまでには時間がかかり、夜間には定期的に目が覚めます。この時間はグラフ上で"覚醒"と表されます。

### :blue\_circle:**レム睡眠**

研究によれば、レム睡眠は記憶と脳の回復において重要な役割を果たしています。目は左右に動きます。最初のレム睡眠は、約90分後に眠りについてから起こります。

### :purple\_circle:深い睡眠･**コア睡眠**

このステージでは筋活動が低下し、体温が下がります。睡眠時間の大部分を占めるステージで、他の睡眠ステージと同様に非常に重要です。

また､このステージでは体の修復を促し、必要なホルモンを分泌します。徐波睡眠とも呼ばれ、夜間の前半で比較的長い時間にわたって生じます。とてもリラックスした状態にあるため、深い睡眠から覚醒することは通常困難だとされています。


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