Seasonal variations in the comfortable bedroom temperature at the time of waking

Abstract: In Japan, many women complain of coldness, and suggestions for addressing the problem are needed. This study derived a comfortable waking room temperature based on bedroom and outdoor temperatures during waking hours and the associated thermal sensations, which were measured over a period of 16 months for a participant who experienced strong coldness. The basal body temperature remained biphasic but varied seasonally. In addition, the thermal sensations changed during the year. From winter to summer, the participant did not report being comfortable unless the bedroom temperature reached 21.4 °C, whereas from summer to winter, the comfortable temperature threshold was 17.3 °C. The bedroom had a desirable temperature of 20 °C without adjustment in November and a comfortable enough temperature of 18 °C in December and April and 17 °C in January to March. In summer, bedroom temperatures of 24 °C (reduced by 2.5 °C) in July and 26 °C (reduced by 1 °C) in August would be sufficient for the body to acclimatize to the heat.

Keywords: Thermal sensation, Cold sense, Young female, Seasonal variation, Bedroom temperature, Waking time

DOI: 10.54941/ahfe1004916

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