The effect of a cold environment on sleep and thermoregulation with insufficient bedding assuming an emergency evacuation

Tsuzuki, Kazuyo; Mochizuki, Yosuke; Maeda, Kazuki; Nabeshima, Yuki; Ohata, Teruhisa; Draganova, Vanya Y.

doi:10.1016/j.enbuild.2019.109562

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…ACT was also applied to the study of the effect of light environment on sleep quality, [155][156][157][158][159][160][161][162] which was similar to that in Section 3.1.4, including the effect of light throughout the day, light at night, light during sleep, and light in the early morning on sleep. Similarly, ACT had been used in many studies of thermal environments and sleep, [163][164][165][166][167][168][169][170] Electrocardiography originates from bioelectrical changes in cardiac myocytes and is a feedback of biointegrated changes in myocytes of the heart from excitation generation, conduction to recovery. 180 The ECG signal is processed to obtain HR and HRV; then, the sleep quality is determined.…”

Section: Application In Environmental Researchmentioning

confidence: 99%

“…ACT was also applied to the study of the effect of light environment on sleep quality, 155–162 which was similar to that in Section 3.1.4, including the effect of light throughout the day, light at night, light during sleep, and light in the early morning on sleep. Similarly, ACT had been used in many studies of thermal environments and sleep, 163–170 including studies of pure temperature and thermal‐humidity coupling, both with natural and artificial environments. Studies exploring the effects of IAQ on sleep were rare, especially those that used ACT, 171 probably because ACT was generally applied in field studies, where the bedroom environment was difficult to control precisely and the variability between samples is large, often resulting in multiple environmental factors affecting sleep at the same time.…”

Section: Common Assessment Of Sleep Qualitymentioning

confidence: 99%

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Objective sleep assessments for healthy people in environmental research: A literature review

Lian

2022

Indoor Air

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To date, although many studies had focused on the impact of environmental factors on sleep, how to choose the proper assessment method for objective sleep quality was often ignored, especially for healthy subjects in bedroom environment. In order to provide methodological guidance for future research, this paper reviewed the assessments of objective sleep quality applied in environmental researches, compared them from the perspective of accuracy and interference, and statistically analyzed the impact of experimental type and subjects' information on method selection. The review results showed that, in contrast to polysomnography (PSG), the accuracy of actigraphy (ACT), respiratory monitoring‐oxygen saturation monitoring (RM‐OSM), and electrocardiograph (ECG) could reach up to 97%, 80.38%, and 79.95%, respectively. In terms of sleep staging, PSG and ECG performed the best, ACT the second, and RM‐OSM the worst; as compared to single methods, mix methods were more accurate and better at sleep staging. PSG interfered with sleep a great deal, while ECG and ACT could be non‐contact, and thus, the least interference with sleep was present. The type of experiment significantly influenced the choice of assessment method (p < 0.001), 85.3% of researchers chose PSG in laboratory study while 82.5% ACT in field study; moreover, PSG was often used in a relatively small number of young subjects, while ACT had a wide applicable population. In general, researchers need to pay more attention at selection of assessments in future studies, and this review can be used as a reliable reference for experimental design.

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Section: Application In Environmental Researchmentioning

confidence: 99%

Section: Common Assessment Of Sleep Qualitymentioning

confidence: 99%

Objective sleep assessments for healthy people in environmental research: A literature review

Lian

2022

Indoor Air

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“…Sleep quality depends on the thermal insulation of the bedding microclimate rather than the ambient temperature. Bedding microclimate with good thermal insulation protects sleep quality [22].…”

Section: The Effect Of Ambient Temperature On Sleep?mentioning

confidence: 99%

Entropic Assessment of Sleeping Comfort

Özilgen

KAYALI

Yılmaz

et al. 2022

International Journal of Thermodynamics

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In the literature longevity and comfort are evaluated in terms of entropy generation and export rates. When people cannot export entropy, they experience discomfort. Effect of bedding, pajamas and levels of body coverage have been assessed in 270 cases by referring to body weight and height of 25 years old women. By 160 cm tall and 50 kg women, at 0 °C of room temperature, entropy export rates were 6.0x10--3 and 7.4x10--3 W/kg K, while they were sleeping on their back and on the side, respectively. The results showed that entropy export became more difficult as the body temperature approached the room temperature. Textile properties, including heat transfer and wicking rates of sweat removal were also important while exporting the entropy. The results of this study may be employed while designing beds or beddings, pajamas and comforters to achieve a more comfortable sleeping environment.

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“…The percentage of covering and the corresponding insulation value were evaluated using the respondents' information in the questionnaire for which they were asked to make a selection, as shown in Figure 3; the respondents were instructed to fill up this information after waking up. This type of evaluation on blanket coverage was also used in the study by Tsuzuki et al [42]. The total insulation values were determined according to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Fundamental Handbook Chapter 9, representing the added insulation values of sleepwear and blanket within a 25% margin of error [43].…”

Section: Field Surveymentioning

confidence: 99%

Effectiveness of a Cool Bed Linen for Thermal Comfort and Sleep Quality in Air-Conditioned Bedroom under Hot-Humid Climate

et al. 2021

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Comfort temperature and sleep quality involving 20 participants were determined in two cases: Case A (arbitrary, controlled air-conditioner setting) and Case B (adjustment of 3 °C higher than the setting of Case A with cool bed linen). Data of indoor thermal comfort and electricity consumption were collected every night throughout the measurement period. Questionnaires on thermal comfort and sleep quality were distributed twice a night for a duration of three nights for each case; the first night was for respondents’ adaptation and the following two nights were for measurement. The sleep quality of the respondents was objectively measured using a commercially available activity tracker. Results found that most respondents were thermally comfortable in both cases, with 39% lower energy consumption reported for Case B compared to Case A. The thermal conditions of Case B were found to be more tolerable than those of Case A. Most respondents reported to have a calm and satisfied sleep for both cases. Comfort temperature and Sleep Efficiency Index (SEI) were found to be maintained in both cases.

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The effect of a cold environment on sleep and thermoregulation with insufficient bedding assuming an emergency evacuation

Cited by 9 publications

References 12 publications

Objective sleep assessments for healthy people in environmental research: A literature review

Objective sleep assessments for healthy people in environmental research: A literature review

Entropic Assessment of Sleeping Comfort

Effectiveness of a Cool Bed Linen for Thermal Comfort and Sleep Quality in Air-Conditioned Bedroom under Hot-Humid Climate

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