The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding
Most people do not use heating systems during nocturnal sleep in their bedrooms during the cold season in Japan; instead, they like to use extra blankets and quilts for sleeping. To investigate the effect of low air temperature (Ta) on sleep and thermoregulation when sleeping with bedding, 12 health...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-05-01
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| Series: | Buildings |
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| Online Access: | http://www.mdpi.com/2075-5309/8/6/76 |
| _version_ | 1811238546730647552 |
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| author | Kazuyo Tsuzuki Kazue Okamoto-Mizuno Koh Mizuno |
| author_facet | Kazuyo Tsuzuki Kazue Okamoto-Mizuno Koh Mizuno |
| author_sort | Kazuyo Tsuzuki |
| collection | DOAJ |
| description | Most people do not use heating systems during nocturnal sleep in their bedrooms during the cold season in Japan; instead, they like to use extra blankets and quilts for sleeping. To investigate the effect of low air temperature (Ta) on sleep and thermoregulation when sleeping with bedding, 12 healthy young men participated in sleep experiments over three non-consecutive nights. The experimental conditions were at a Ta of 3 °C, 10 °C and 17 °C, with a relative humidity (Rh) of 50% and an air velocity of <0.2 m/s in the climatic chambers. The 4.3-clo bedding consisted of cotton sheets, an acrylic blanket, a down-filled quilt and a futon mattress. The average sleep efficiency index (SEI) remained >94% for each of the three Tas, and no disturbances were found by Ta in the sleep parameters, although the duration of rapid eye movement (REM) sleep showed variations at 3 °C. The skin temperature (Ts) of the forehead decreased in proportion to Ta and remained stable. The decreasing rate in rectal temperature (Tre), Ts of forehead and thigh during sleep were significantly greater at 3 °C than at 10 °C and 17 °C. The innermost microclimate temperature (Tmicro) made by the bedding did not correlate with the Tre. The young men were significantly more dissatisfied with 3 °C in the sleep quality evaluation. |
| first_indexed | 2024-04-12T12:43:29Z |
| format | Article |
| id | doaj.art-f9ad034c380b45b3a9e0087dc8c5fab8 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-04-12T12:43:29Z |
| publishDate | 2018-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-f9ad034c380b45b3a9e0087dc8c5fab82022-12-22T03:32:43ZengMDPI AGBuildings2075-53092018-05-01867610.3390/buildings8060076buildings8060076The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using BeddingKazuyo Tsuzuki0Kazue Okamoto-Mizuno1Koh Mizuno2Department of Architecture and Civil Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, JapanHuman Informatics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 6, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8566, JapanDepartment of Education, Tohoku Fukushi University, 1-149-6 Kunimigaoka, Aoba, Sendai, Miyagi 989-3201, JapanMost people do not use heating systems during nocturnal sleep in their bedrooms during the cold season in Japan; instead, they like to use extra blankets and quilts for sleeping. To investigate the effect of low air temperature (Ta) on sleep and thermoregulation when sleeping with bedding, 12 healthy young men participated in sleep experiments over three non-consecutive nights. The experimental conditions were at a Ta of 3 °C, 10 °C and 17 °C, with a relative humidity (Rh) of 50% and an air velocity of <0.2 m/s in the climatic chambers. The 4.3-clo bedding consisted of cotton sheets, an acrylic blanket, a down-filled quilt and a futon mattress. The average sleep efficiency index (SEI) remained >94% for each of the three Tas, and no disturbances were found by Ta in the sleep parameters, although the duration of rapid eye movement (REM) sleep showed variations at 3 °C. The skin temperature (Ts) of the forehead decreased in proportion to Ta and remained stable. The decreasing rate in rectal temperature (Tre), Ts of forehead and thigh during sleep were significantly greater at 3 °C than at 10 °C and 17 °C. The innermost microclimate temperature (Tmicro) made by the bedding did not correlate with the Tre. The young men were significantly more dissatisfied with 3 °C in the sleep quality evaluation.http://www.mdpi.com/2075-5309/8/6/76sleeplow air temperaturebeddingmicroclimatethermal comfort |
| spellingShingle | Kazuyo Tsuzuki Kazue Okamoto-Mizuno Koh Mizuno The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding Buildings sleep low air temperature bedding microclimate thermal comfort |
| title | The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding |
| title_full | The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding |
| title_fullStr | The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding |
| title_full_unstemmed | The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding |
| title_short | The Effects of Low Air Temperatures on Thermoregulation and Sleep of Young Men While Sleeping Using Bedding |
| title_sort | effects of low air temperatures on thermoregulation and sleep of young men while sleeping using bedding |
| topic | sleep low air temperature bedding microclimate thermal comfort |
| url | http://www.mdpi.com/2075-5309/8/6/76 |
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