Effects of thermal environment on sleep and circadian rhythm

This review highlights the impact of thermal environments on sleep and circadian rhythms. High temperatures disrupt deep and REM sleep, while low temperatures alter cardiac autonomic activity without affecting sleep stages. Humid conditions worsen heat-related sleep disturbances. Maintaining an optimal thermal environment supports sleep quality, crucial for cognitive function and overall health. Additionally, thermoregulation is closely tied to circadian rhythms, influencing core body temperature and sleep onset.

Optimize bedroom temperature between 25–28°C and maintain moderate humidity levels for better sleep. Use breathable bedding, ensure proper ventilation, and consider air conditioning in hot climates. These strategies align with thermoregulatory findings but may require tailoring for individual needs and climates.