Influence of the temperature and relative humidity on human heat acclimatization during training in extremely hot environments

Shen, Dan‐Dan; Zhu, Neng

doi:10.1016/j.buildenv.2015.07.023

Cited by 41 publications

(11 citation statements)

References 34 publications

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“…Besides, the relative humidity in hot environments would also affect human heat tolerance [17], productivity [18] and heat acclimatization [19]. These studies explored the negative effect of high air humidity and have been well developed on the improvements [20,21]to the international standards of heat stress [22,23].…”

Section: Introductionmentioning

confidence: 99%

A modified method of evaluating the impact of air humidity on human acceptable air temperatures in hot-humid environments

Ming

et al. 2018

Energy and Buildings

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R. (2018) A modified method of evaluating the impact of air humidity on human acceptable air temperatures in hothumid environments. Energy and Buildings, 158. pp. 393405. ISSN 03787788 Abstract: This research aims to investigate human thermal responses to air humidity in warm and hot environments and to evaluate the effect of humidity on human thermal comfort. 20 subjects were involved in 12 exposure experiments in a well-controlled climate chamber at three relative humidity levels (40%RH, 60%RH, 80%RH) and four air temperature levels (26°C, 28°C, 30°C, 32°C) with no much indoor airflow. The physical environmental and physiological parameters as well as subjective questionnaires were collected simultaneously during the period of experiments. The results show that in hot environments, particularly when the air temperature exceeds 30°C, the relative humidity has a significant effect on human thermal responses both physiologically and subjectively. The Standard Effective Temperature (SET) is biased when evaluating human thermal comfort in the hot-humid environments without considering human thermal adaptation to humidity. Hence, a humidity correction coefficient eRH is proposed to modify the deviation of the SET under different relative humidity levels, and to quantify the effect of humidity on human acceptable air temperatures. The modified acceptable temperature-humidity zone has been obtained using the modified method.

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Section: Introductionmentioning

confidence: 99%

A modified method of evaluating the impact of air humidity on human acceptable air temperatures in hot-humid environments

Ming

et al. 2018

Energy and Buildings

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“…Both of these elements, how one expects to experience the environment (Brager & de Dear, 1998) and one's sensitivity to the environment (Morgan & de Dear, 2003) is a possible product of where one grew up, or currently lives. This suggests that heat risk perceptions could vary based on one's geographic and demographic characteristics (Basu & Samet, 2002;Kántor et al, 2016;McGeehin & Mirabelli, 2001;Sawka, 2015;Shen & Zhu, 2015).…”

Section: Thermal Studiesmentioning

confidence: 99%

Dry Heat Among the Red Rocks: Risk Perceptions and Behavioral Responses to Extreme Heat Among Outdoor Recreationists in Southeastern Utah

Goldstein

Howe

2019

J. of Extr. Even.

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Understanding how people perceive the risks of extreme heat is an essential part of developing better risk communication strategies and ultimately reducing vulnerability to heat. This study analyzed how tourists perceive and respond to extreme heat while recreating on public lands in southeastern Utah, a hot and dry environment. An increasing number of tourists are visiting national parks in the southwestern United States, exposing more people to heat-related health risks. This investigation focuses on how geographic differences of origin and thermal perceptions are associated with risk perceptions of extreme heat, and how risk perceptions in turn are associated with protective behaviors. This study found that risk perceptions of extreme heat were not significantly associated with demographic differences or the geographic origin of respondents. This study did find that while visitors could accurately predict the air temperature, on average within 1.1°C (2°F) of the actual temperature, visitors’ risk perception of extreme heat did not increase as temperatures increased. This study also found that visitors with higher risk perceptions were more likely to have engaged in certain protective behaviors — such as checking the weather conditions before their hike — but not others, such as the amount of water they carried. By understanding how people perceive and respond to the hazard, we can better understand best practices for communicating the risks of extreme heat with the intent of saving lives. These results are intended to help tourist agencies, emergency and natural resource managers and planners, and policymakers in creating and improving communication strategies for extreme heat.

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“…Hot-dry and warm-wet climates are adopted as the comparison conditions. In the experiment, subjects were asked to exercise on a treadmill at two types of work intensities i.e., moderate and heavy work intensities [37][38][39]. Walking at a speed of 3.5 km/h was regarded as moderate work intensity.…”

Section: Experimental Conditionmentioning

confidence: 99%

Research of Interindividual Differences in Physiological Response under Hot-Dry and Warm-Wet Climates

Sun

Peng

et al. 2016

Sustainability

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Somatotype and habitus parameters may affect physiological control system, so the changes of physiological parameters are not the same when various people work in hot-dry and warm-wet climates. In this paper, a chamber built in Tianjin University was used to simulate comfortable, hot-dry and warm-wet climates. Sixty healthy university students were selected as subjects who were divided into four groups based on somatotype and habitus differences. The subjects were asked to exercise on a treadmill at moderate and heavy work intensities. Physiological parameters (rectal temperature and heart rate) were measured after every 10-min work in the climate chamber. For different groups, the change trends of physiological parameters were different. With the enhancement of experimental conditions, the differences among four groups were weakened. Body surface area per unit of body mass (BSA/mass), percentage of body fat (%fat), and maximum oxygen consumption per unit of body mass (VO 2max /mass) were adopt to establish a revised body characteristic index (RBCI). RBCI was proved having significant correlation with physiological parameters, which means RBCI as the combined factors of somatotype and habitus parameters can be applied to evaluate the effect of individual characteristics on physiological systems.

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Influence of the temperature and relative humidity on human heat acclimatization during training in extremely hot environments

Cited by 41 publications

References 34 publications

A modified method of evaluating the impact of air humidity on human acceptable air temperatures in hot-humid environments

A modified method of evaluating the impact of air humidity on human acceptable air temperatures in hot-humid environments

Dry Heat Among the Red Rocks: Risk Perceptions and Behavioral Responses to Extreme Heat Among Outdoor Recreationists in Southeastern Utah

Research of Interindividual Differences in Physiological Response under Hot-Dry and Warm-Wet Climates

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