If adapted to noise, is it still interfering with sleep?
You have explained how even if we think we are sleeping well, if there is light, that light is interfering with quality of our sleep. Is this also true of noise? If you live say, on a noisy street next to a bar, but have learned to fall asleep despite lots of loud noise, is that noise still being processed in a way that interferes with your sleep cycle/quality of sleep?
For shift workers. Deliberate Heat Exposure/Sauna to counter sleep deprivation bad effects.
Considering that after sleep deprivation, subjects in several studies had higher levels of cortisol later in the day, and considering also that deliberate Heat Exposure (aka Sauna) decrease the level of cortisol. Is it safe to say that shift workers should consider the use of sauna before and after shift works ? What would be the protocol ? I think a lot of shift workers might not know the bad effect of sleep deprivation on their body and how to counter these bad effects. Thank you very much for considering this question.