Effect of thermal environment on sleep quality in actual bedroom in summer by sleep stages analysis

This study analyzed the impact of bedroom thermal environments on sleep quality during summer using advanced sleep measurements. It found that neutral air temperatures (25–28°C) significantly reduced the time it took to fall asleep and improved overall sleep efficiency. Excessive air turbulence or high air velocities negatively impacted sleep, particularly during lighter sleep stages. Deep sleep was more resilient to temperature variations, highlighting the importance of a stable, comfortable thermal environment for quality rest and cognitive recovery.

For optimal sleep, maintain bedroom temperatures between 25–28°C and avoid strong airflows near the bed. Use air conditioning or fans judiciously, ensuring they create a gentle, consistent environment. Tailor thermal conditions to personal comfort, as stable settings support better cognitive and physical restoration during sleep.