Sleeping in a bedroom with carbon dioxide levels >900 ppm leads to a consistent and robust

Well SupportedMaintaining bedroom carbon dioxide levels below 900 parts per million while sleeping is recommended for better sleep quality.

Well SupportedCarbon dioxide levels above 900 ppm in a bedroom impair sleep quality and reduce next-day cognitive performance.

Well SupportedOpening a window slightly before bed can improve airflow and prevent carbon dioxide buildup.

Partially SupportedImproving CO2 tolerance through breathwork can buffer the body's reaction to elevated carbon dioxide levels.

Well Supported