I've noticed that I sleep poorly when I'm the least bit chilled. And "chilled" can vary--some nights my body runs warm and others I run a bit cool and just cozy up in my robe. If I can feel the draft from the air conditioner vent coming through my blanket, I'll toss and turn and drift in and out of sleep. Yet when it's too warm, I sleep late and wake up with a muzzy head and a pounding headache.
I often keep a light blanket on top of my comforter, so I can take it on or off during the night if I need to. While it's a pain sometimes (often I'll find it bunched up at the foot of the bed), at least I can use it to regulate the temp under my comforter.
Has anyone else noticed this effect on their sleep? Would Paleo man have been less sensitive to temp fluctuations while they slept?
EDIT: I found this article that does mention that when a room is too hot or cold it makes the body work harder to get to its optimum temperature at night