Why do we feel cold after waking up forcibly (like from an alarm) but it’s more manageable if we wake up naturally?

Question

Yesterday, I woke up after 3h of sleep with an alarm to go to work. It felt as if my ass would fall off from the cold. Today, I had slept enough and woke up before the alarm, and I found it much easier and not nearly as cold.

In: 15

Answer 1

Your body temperature drops as you fall asleep, and slowly rises in the 30 minutes or so during which you normally begin to awaken. If you wake up from a dead sleep you’re likely to be a bit colder, all other factors such as time of day and ambient temp being equal.