Does lowering my bedroom temperature to sixty degrees actually improve my deep sleep cycle?

I recently went down a massive rabbit hole reading about the thermal regulation of the body during REM sleep, so I decided to experiment by dropping my bedroom thermostat to a chilly sixty degrees every night. For the first week, I felt like a polar bear hibernating in my own bed, wearing thick wool socks and piling on three weighted blankets just to stay functional. While my Oura ring data shows a slight uptick in my deep sleep percentage, I’m wondering if the sheer effort of staying warm is actually counterproductive. Is there a point where we take the 'cold room' advice too far, or is the shivering-induced metabolic cost actually worth the extra five minutes of REM? Has anyone else tried this extreme temperature shift and noticed a real difference in their morning cognitive clarity, or are we all just obsessing over marginal gains while freezing ourselves for no reason? I am genuinely curious if anyone has found a 'sweet spot' that doesn't involve waking up feeling like an icicle.