There have been many debates on whether it is healthier to sleep with the window open or closed. Dutch researchers just did a study on healthy volunteers to see if leaving the window open helped them get a better night’s sleep.
The researchers found that when the window was open, the room had lower levels of carbon dioxide (humans breathe in oxygen and breathe out carbon dioxide). This led to better quality sleep, the study found.
Lower carbon dioxide led to better sleep depth, and less awakenings. The researchers used EEG machines on the study participants to gauge the quality of sleep.
Researchers also found that a cooler room led to better sleep. Room temperature set between 60-67 degrees was thought to be optimal.
Healthfacts.blog 