The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding

Tsuzuki, Kazuyo; Okamoto-Mizuno, Kazue; Mizuno, Koh

doi:10.3390/buildings8060076

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…However, this is not consistent with previous findings of a decreased REM proportion as the temperature increased above 28°C [6,37]. Although Tsuzuki et al [27] revealed REM sleep changes at relatively low temperatures, they used a range of 3°C-17°C, which did not overlap with our temperature range. The proportion of REM sleep was 19.40%±4.13% at 28°C.…”

Section: Discussioncontrasting

confidence: 99%

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A Preliminary Study of the Effect of Mattress Temperature on the Subjective and Objective Sleep Quality of Healthy Young Adults

et al. 2022

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Objective: We evaluated the effects of microclimate temperature on the subjective and objective sleep quality of healthy young adults. For this purpose, we maintained a constant ambient temperature and manipulated the mattress temperature to change the microclimate.Methods: We enrolled 34 healthy young adults (12 males and 22 females; mean age: 24.06±2.70 years). Data from 26 individuals were analyzed (8 males and 18 females; mean age: 23.46±2.40 years). Nocturnal polysomnography (nPSG) was performed and self-reported questionnaires were completed at an ambient temperature of 27°C and mattress temperature of 28°C, 30°C, or 32°C.Results: The subjective sleep satisfaction was lower at a mattress temperature of 32°C than at 28°C. The subjective sleep latency was longer at 32°C than at 30°C. The number of respondents that selected sleep environment (including temperature) as the cause of sleep dissatisfaction was greater at higher temperatures. Participants felt that the mattress temperature was the least cool when they woke up at 32° than 30°C. Furthermore, they reported that the sleep latency at 32°C was longer than the other temperatures compared to usual sleep, and that they had more frequent awakenings at 32°C than at 28°C. The nPSG results showed that the proportion of rapid eye movement (REM) sleep was lower at 28°C than at 30°C.Conclusion: A high microclimate temperature caused by a high mattress temperature was associated with poor subjective sleep quality. Mattress temperature was also related to the objective proportion of REM sleep; however, the results are inconsistent with previous findings. Additional large-scale studies that evaluate a wider temperature range are required.

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Section: Discussioncontrasting

confidence: 99%

“…Similarly, other studies have reported an appropriate Tm of 28°C-31°C [25,26]. One study reported that a Tm of 30°C-32.5°C, which is slightly higher than the aforementioned range, is optimal [27]. Some studies have also reported that the appropriate upper range of the Tm is 35°C [17,22].…”

Section: Cimmentioning

confidence: 90%

A Preliminary Study of the Effect of Mattress Temperature on the Subjective and Objective Sleep Quality of Healthy Young Adults

et al. 2022

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“…However, people may still feel uncomfortable if one or more parts of the body are too warm or too cold. Referring to [25], young men were significantly dissatisfied with 3℃ indoor temperature in sleep quality evaluation. The ambient temperature should be maintained at a level higher than 10℃ in the bedroom.…”

Section: Discussionmentioning

confidence: 99%

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

Zhao

et al. 2019

Energy and Buildings

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“…Two other field intervention experiments found poor sleep quality with windows open owing to inadequate control of noise interference in the window-open condition, which could mediate the relationship between CO 2 level and sleep quality [14,15]. In Japan, during winter, with 12 young male participants, the appropriate air temperature for sleep was found to be 10 °C, among the three evaluated: 3, 10, and 17 °C [16]. Airflow may improve sleep patterns in high-temperature conditions [17,18].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Sleep Quality in Naturally Ventilated Rooms under Moderate Climate Conditions

Kondo,

Asawa

2023

Indoor Air

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Optimizing the thermal environment of a bedroom is desirable for good sleep. In moderate climatic conditions, natural ventilation is a viable method for enhancing the quality of sleep by improving indoor air conditions. This study examined the effects of air temperature and wind speed on sleep quality in naturally ventilated rooms with windows open and closed, during autumn. Thirteen young males in healthy conditions participated in this study. Two adjacent test rooms (for opened and closed conditions) were selected on a university campus, with standardized indoor conditions. Air temperature and wind speed were measured near the height of the participants’ heads. Sleep efficiency and wake after sleep onset (WASO) were calculated using physiological wearable sensors based on heart rate and body movement. The participants completed questionnaires on thermal sensation and comfort before and after sleep. The results showed that the lowest percentage of WASO was observed when the nocturnal mean temperature was 23–24°C with a quadratic regression curve regardless of the window opening conditions. Conversely, subjective sleep satisfaction and WASO did not show any significant differences between the conditions. The results revealed no significant impact of varying thermal and airflow conditions during autumn on thermal/airflow comfort, although significant differences were observed in the thermal/airflow sensation before and after sleep. Thus, these results suggest that natural ventilation through the opening of windows might not affect thermal/airflow comfort, while a nocturnal indoor air temperature of 23–24°C is recommended for good sleep and thermal comfort, regardless of window opening conditions under moderate climate conditions.

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The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding

Cited by 11 publications

References 23 publications

A Preliminary Study of the Effect of Mattress Temperature on the Subjective and Objective Sleep Quality of Healthy Young Adults

A Preliminary Study of the Effect of Mattress Temperature on the Subjective and Objective Sleep Quality of Healthy Young Adults

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

Experimental Study on Sleep Quality in Naturally Ventilated Rooms under Moderate Climate Conditions

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