sleep is not a pause button
When you sleep, you rest. But your body doesn't simply switch off. It continues to function, it just does so in a different, more relaxed way. The way oxygen is used also changes—and that's perfectly normal.
Do less, different needs
At night, your body is active differently. You move less, your muscles are relaxed, and all your energy is focused on recovery and cleansing. That's why your body uses oxygen differently than it does during the day. This happens completely automatically – you don't have to do anything.
Why your breathing feels calmer
Because your body goes into a kind of "energy saving mode," your breathing also changes. It often becomes slower, more even, and feels less powerful. This isn't because there's anything lacking, but because your body chooses precisely that rhythm to help you relax properly.
If you notice it, that's okay
Some people clearly feel this difference and wonder if everything is alright. Usually, it's a sign that your body is adjusting smoothly to the night. It knows exactly what to do. So it's not something to worry about, but something to be confident about.