The Science Behind: Sleep Sanctuary
Sleep science is clear on optimal conditions. Here's what research says.
Temperature:
Your body needs to cool down to initiate sleep. Studies show:
- Optimal bedroom temperature: 60-67°F (15-19°C)
- A warm bath before bed helps (raises then drops core temp)
- Cooler room = faster sleep onset
- Hot rooms disrupt REM sleep
If you're too warm at night, you won't sleep as deeply.
Light:
Light is the strongest cue for your circadian rhythm:
- Even small amounts of light reduce melatonin production
- Blue light (screens) is worst, but any light disrupts
- True darkness promotes deeper sleep
- Light through eyelids still registers
Even your phone's notification LED can fragment sleep.
Sound:
Research shows:
- Consistent background noise (white noise, fan) improves sleep
- Sudden noises (traffic, dogs) cause awakenings
- Your brain processes sound even while asleep
- 35dB or less is ideal
If you can't eliminate noise, mask it with consistent sound.
The takeaway:
Environment isn't preference—it's science. Optimize conditions and sleep improves.
Stillness Cards provide mental stillness to complement physical environment.