Ambient temperature and human sleep

Muzet, Alain; Libert, Jean‐Pierre; Candas, Victor

doi:10.1007/bf01952376

Cited by 111 publications

(75 citation statements)

References 23 publications

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“…This is in agreement with previous studies that found that heat stress reduced Stage N3 and REM sleep, but not the duration of stages N1 or N2. 7,8,48,54 Compared with back cooling, the subjects were more thermally comfortable and reported better sleep quality and had higher sleep efficiency and shorter wake time after sleep onset in the back and head (neck) cooling condition ( Figure 3, Table 4). It should be noted that the background air temperature in the back and head (neck) cooling condition was higher than that in the back cooling alone condition.…”

Section: Discussionmentioning

confidence: 99%

“…3,4 The thermoregulatory system and the sleep regulating mechanisms have been shown to be strongly linked in humans, 5,6 and this was later confirmed by many studies that show high or low air temperatures, even moderately different from the neutral temperature, could significantly decrease sleep quality. [7][8][9][10] However, in many areas with long and hot summers, indoor air temperatures are very high. For example, in southern China, the indoor air temperature was found to be higher than 34°C in natural ventilated buildings during the summer season.…”

Section: Introductionmentioning

confidence: 99%

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Local body cooling to improve sleep quality and thermal comfort in a hot environment

et al. 2017

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The effects of local body cooling on thermal comfort and sleep quality in a hot environment were investigated in an experiment with 16 male subjects. Sleep quality was evaluated subjectively, using questionnaires completed in the morning, and objectively, by analysis of electroencephalogram (EEG) signals that were continuously monitored during the sleeping period. Compared with no cooling, the largest improvement in thermal comfort and sleep quality was observed when the back and head (neck) were both cooled at a room temperature of 32°C. Back cooling alone also improved thermal comfort and sleep quality, although the effects were less than when cooling 1,2 Disturbed nocturnal sleep also has consequential effects on health, increasing the risk of obesity, Type 2 diabetes, and cardiovascular disease. 3,4 The thermoregulatory system and the sleep regulating mechanisms have been shown to be strongly linked in humans, 5,6 and this was later confirmed by many studies that show high or low air temperatures, even moderately different from the neutral temperature, could significantly decrease sleep quality. 7-10 However, in many areas with long and hot summers, indoor air temperatures are very high. For example, in southern China, the indoor air temperature was found to be higher than 34°C in natural ventilated buildings during the summer season. 11 A survey in Indonesia found that the indoor air temperatures were higher than 32°C in naturally ventilated residential buildings. 12 Global warming that leads to higher temperatures will create still hotter indoor conditions. Attention is now being paid to how climate change may degrade the indoor thermal environment in buildings.13 It has been reported that heat-related deaths correlate, not just with daytime temperature, but also with nighttime temperatures. The highest risk factor for heat-related death is a bedroom located on the second floor without air-conditioning. 14 A study in 79 households in Greenland showed that in summer 19% of all bedroom temperature were above 26°C although the outside temperatures averaged no more than 9.5°C. 15Full air-conditioning may be one of the easiest ways to improve thermal environment. However, large amounts of cool air (often recirculated room air, for residential buildings) must be supplied to maintain indoor temperatures at acceptable levels in the entire building (including unoccupied areas), leading to increased energy consumption. 16Thus, especially in areas with hot summers, the long summer period

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local body cooling to improve sleep quality and thermal comfort in a hot environment

et al. 2017

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“…Since at rest the human body produces minimal heat energy, higher requirements are demanded for the thermal insulation capacity of textiles for bedding [25]. Like the fabrics for clothing, textiles for bedding and blankets should absorb and transport water vapor emitted by the human body during rest and sleep.…”

Section: Non-woven Textiles As Beddingmentioning

confidence: 99%

Non-Woven Textiles in the Indoor Environment

Angelova¹

2016

Non-Woven Fabrics

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The chapter presents the basic metrics of the indoor environment that are used to assess the quality of living and working, together with the risk factors and pollutants indoors. From this point of view the non-woven textiles are presented and discussed. Different groups of non-woven materials are considered: floor coverings, wallcoverings, upholstery and furniture textiles, filters of the HVAC systems, etc. Their particular application on the indoor environment is presented and their effect on the metrics of the Indoor Environmental Quality (IEQ) is analyzed.

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“…Available research indicates that temperature is a key variable in relation to the ability to sleep soundly (Okamoto-Mizuno and Mizuno, 2012;Gilbert, et al, 2004;Okamoto-Mizuno, et al, 1999;Muzet, et al, 1984;Haskell, et al, 1981). When people are either too hot or too cold they are likely to sleep fitfully or not at all.…”

Section: Cabin Temperaturementioning

confidence: 99%

Elusive corporate social responsibility (CSR) in global shipping

Sampson

Ellis

2015

Journal of Global Responsibility

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Using the example of the highly globalised shipping industry this paper seeks to shed light upon the practice of corporate social responsibility (CSR) and the extent to which it might be relied upon to fill international regulatory gaps. The paper draws upon findings from a study of accommodation design undertaken just prior to new international regulations coming into force pertaining to seafarer welfare and living conditions. It interrogates the notion that regulation is 'not really required' in relation to the protection of seafarer welfare in the shipping industry because ship operators already maintain 'reasonable standards' for their workforce in line with a commitment to CSR. The paper concludes that contrary to this idea, seafarers' welfare remains neglected by many companies who nevertheless position themselves as situated amongst the 'better quality' ship operators. It suggests that regulation is consequently highly necessary and that a priority for the international community should be to develop the relatively low standards currently required by existing regulation to provide for better standards of seafarer welfare across the global fleet. This evidence from the shipping industry seems to call into question assumptions about the normative basis for Corporate Social Responsibility more generally and lends weight to those who argue that the apparent exercise of CSR by multinational companies should broadly be understood as an exercise in public relations.

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Ambient temperature and human sleep

Cited by 111 publications

References 23 publications

Local body cooling to improve sleep quality and thermal comfort in a hot environment

Local body cooling to improve sleep quality and thermal comfort in a hot environment

Non-Woven Textiles in the Indoor Environment

Elusive corporate social responsibility (CSR) in global shipping

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