I've heard two different methods to maximize calorie expenditure during sleep- One is stay really warm, to the point that you are sweating, the other is to lower the room temperature so your body has to fight to keep your core temperature elevated.
Which one is it?
Can you please provide evidence?
PS. I've searched everywhere and can't seem to find what I'm looking for. The answer will help me win a bet, but evidence is needed (via a roport, study, article or something similar.) I'm also interested for my own purpose. Thanks again.