Why does it take so long to fall asleep initially, but feels super easy when woken up by your alarm?
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Sleep, like a lot of functions in your body, is controlled by hormones. To fall asleep your body needs to produce a certain amount of sleep hormones, as soon as that threshold is reached you fall asleep. When you get woken up by your alarm and haven’t gotten enough sleep yet your body is still full of sleep hormones, so falling back asleep is really easy. Then there are also sleep cycles, each cycle is around ~~3 hours~~ 90 minutes long. If you get woken up near the beginning or end of a cycle you’ll probably feel more or less fine, but if you get woken up in the middle you’ll feel super groggy and want to finish up the cycle as fast as possible.
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