Scientists from the Technical University of Denmark found that sleep quality improves in a well-ventilated room. Research results published at Science Direct.
35 people aged between 27 and 64 who did not have sleep disorders participated in the study. Participants had to spend four weeks in special rooms with a controlled ventilation system. In the first week, the subjects got used to their new place of residence. Over the next three weeks, the researchers varied the intensity of air circulation in the participants’ rooms during their nightly sleep.
Scientists have found that ventilation intensity has a significant impact on indoor CO2 (carbon dioxide) concentrations. CO2 levels were significantly higher, especially in rooms with poor air circulation. At the same time, CO2 concentration decreased with good ventilation of the rooms.
In the study, sleep quality was evaluated using objective measurements such as total rest time, duration of sleep stages (non-REM and REM), and number of awakenings during the night. It turned out that the decrease in the concentration of carbon dioxide in the room due to increased ventilation intensity contributes to a decrease in the number of awakenings, an increase in the depth of sleep and a decrease in its sensitivity.
Scientists recommended that people who sleep poorly should open windows or use mechanical ventilation systems at night. This will help improve air quality and improve sleep.
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