Thermal regulation and comfort during a mild-cold exposure in young Japanese women complaining of unusual coldness

2002 ◽  
Vol 92 (3) ◽  
pp. 1029-1035 ◽  
Author(s):  
Kei Nagashima ◽  
Tamae Yoda ◽  
Tomoko Yagishita ◽  
Aki Taniguchi ◽  
Takayoshi Hosono ◽  
...  
Keyword(s):  
Cold Exposure ◽  
Baseline Level ◽  
Thermal Sensitivity ◽  
Japanese Women ◽  
The Body ◽  
Body Core ◽  
Young Japanese Women ◽  
C And N ◽  
Baseline Levels ◽  
Skin Temperatures

We examined body core and skin temperatures and thermal comfort in young Japanese women suffering from unusual coldness (C, n = 6). They were selected by interview asking whether they often felt severe coldness even in an air-conditioned environment (20–26°C) and compared with women not suffering from coldness (N, n = 6). Experiments were conducted twice for each subject: 120-min exposure at 23.5°C or 29.5°C after a 40-min baseline at 29.5°C. Mean skin temperature decreased ( P < 0.05) from 33.6 ± 0.1°C (mean ± SE) to 31.1 ± 0.1°C and from 33.5 ± 0.1°C to 31.1 ± 0.1°C in C and N during the 23.5°C exposure. Fingertip temperature in C decreased more than in N ( P < 0.05; from 35.2 ± 0.1°C to 23.6 ± 0.2°C and from 35.5 ± 0.1°C to 25.6 ± 0.6°C). Those temperatures during the 29.5°C exposure remained at the baseline levels. Rectal temperature during the 23.5°C exposure was maintained at the baseline level in both groups (from 36.9 ± 0.2°C to 36.8 ± 0.1°C and 37.1 ± 0.1°C to 37.0 ± 0.1°C in C and N). The rating scores of cold discomfort for both the body and extremities were greater ( P < 0.05) in C than in N. Thus the augmented thermal sensitivity of the body to cold and activated vasoconstriction of the extremities during cold exposure could be the mechanism for the severe coldness felt in C.

Design of a Stitched Textile-Based Thermal Actuator Garment to Attenuate Peripheral Microclimate Experience

2018 ◽  
Author(s):  
Nika Gagliardi ◽  
Esther Foo ◽  
Ellen Dupler ◽  
Simon Ozbek ◽  
Lucy Dunne
Keyword(s):  
Thermal Comfort ◽  
Thermal Sensitivity ◽  
The Body ◽  
Vascular Response ◽  
Chemical Heat ◽  
Cold Temperatures ◽  
Thermoneutral Zone ◽  
Commercial Market ◽  
Body Core ◽  
Emotional Effects

Temperature is an important influencer of homeostatic comfort for humans, and its influence extends beyond life-preservation functions into cognitive and emotional effects. To augment metabolic processes in cold climates, many on-body heating solutions are currently available in the commercial market, ranging from chemical heat packs to electrically heated accessories and clothing. These products typically prioritize heating the body core in extreme conditions. By contrast, the experience of thermal comfort in the band around homeostatic comfort temperatures is much more strongly driven by experience of temperature in the body’s periphery: the hands, feet, and face [1]. Thermal sensitivity is highest in the distal extremities and has been established as the best correlate of overall perception of thermal comfort [2], [3]. In the medical context, this is especially significant in treating vasospastic disorders such as Raynaud’s Syndrome, where a spastic vascular response in peripheral vessels results in an over-reaction to cold temperatures proximal to the thermoneutral zone [4].

Response to cold of Eskimos of the eastern Canadian Arctic

1963 ◽  
Vol 18 (5) ◽  
pp. 970-974 ◽  
Author(s):  
G. Malcolm Brown ◽  
Robert E. Semple ◽  
C. S. Lennox ◽  
G. S. Bird ◽  
C. W. Baugh
Keyword(s):  
Blood Flow ◽  
Venous Blood ◽  
Canadian Arctic ◽  
The Body ◽  
Arterial Blood ◽  
Acute Cold Exposure ◽  
Body Core ◽  
Average Skin ◽  
Skin Temperatures ◽  
Eastern Canadian Arctic

Skin, muscle, and rectal temperatures, and O2 consumption of Eskimos and Caucasians have been compared during an acute cold exposure involving immersion of one hand and forearm in a 5 C water bath. The Eskimos consumed less O2, maintained their rectal temperatures at a higher level, and gave up less heat from the muscles of the limbs. Though the Eskimos had significantly more adipose tissue, average skin temperatures were the same in the two groups. The pattern of temperatures noted now and the previously observed higher blood flow in the hand and forearm of Eskimos point to increased cooling of arterial blood by returning venous blood in the extremities with resultant preservation of heat in the body core. Submitted on August 6, 1962

ESTIMATION OF THE BODY COMPOSITION OF YOUNG JAPANESE WOMEN MEASURED BY SIMPLE ANTHROPOMETRIC MEASUREMENTS

1997 ◽  
Vol 17 (7) ◽  
pp. 1083-1089
Author(s):  
Hiroyuki Yamagishi ◽  
Tsutomu Kuchiki ◽  
Hideki Okazaki ◽  
Akira Itabashi ◽  
Takao Kitano
Keyword(s):  
Body Composition ◽  
Japanese Women ◽  
The Body ◽  
Anthropometric Measurements ◽  
Young Japanese Women

ADAPTATION OF WHITE MICE (MUS MUSCULUS) TO REPEATED COOLING

1967 ◽  
Vol 45 (3) ◽  
pp. 321-327 ◽  
Author(s):  
David M. Ogilvie
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Mus Musculus ◽  
Room Temperature ◽  
The Body ◽  
Progressive Decrease

The effects, on the body temperature of white mice, of repeated short exposures to cold were investigated using two methods of restraint. Animals held in a flattened posture became hypothermic at room temperature, cooled more than five times as fast at −10 °C as mice that could adopt a heat-conserving posture, and continued to cool for some time after they were removed from the cold. With repeated tests, cooling at room temperature decreased, and an improvement in re warming ability was observed. In addition, with lightly restrained mice, the fall in rectal temperature during cold exposure showed a progressive decrease, a phenomenon not observed with severely restrained animals.

scholarly journals Occupant behaviour and thermal comfort in buildings: Monitoring the end user

2019 ◽  
Vol 111 ◽  
pp. 04056
Author(s):  
Loes Visser ◽  
Boris Kingma ◽  
Eric Willems ◽  
Wendy Broers ◽  
Marcel Loomans ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Energy Performance ◽  
The Body ◽  
Activity Level ◽  
Biophysical Model ◽  
Zone Model ◽  
Occupant Behaviour ◽  
Ambient Conditions ◽  
Skin Temperatures ◽  
Thermoregulatory Behaviour

Studies indicate that the energy performance gap between real and calculated energy use can be explained for 80% by occupant behaviour. This human factor may be composed of routine and thermoregulatory behaviour. When occupants do not feel comfortable due to high or low operative temperatures and resulting high or low skin temperatures, they are likely to exhibit thermoregulatory behaviour. The aim of this study is to monitor and understand this thermoregulatory behaviour of the occupant. This is a detailed study of two females living in a rowhouse in the city of Heerlen (Netherlands). During a monitoring period of three weeks over a time span of three months the following parameters were monitored: activity level, clothing, micro climate, skin temperatures and thermal comfort and sensation. Their micro climate was measured at five positions on the body to assess exposed near body conditions and skin temperature. Every two hours they filled in a questionnaire regarding their thermal comfort and sensation level (7-point scale), clothing, activities and thermoregulatory behaviour. The most comfortable (optimal) temperature was calculated for each person by adopting a biophysical model, a thermoneutral zone model. This study shows unique indivual comfort patterns in relation to ambient conditions. An example is given how this information can be used to calculate the buildings energy comsumption.

scholarly journals C allele of angiotensin II type 1 receptor gene A1166C polymorphism affects plasma adiponectin concentrations in healthy young Japanese women

2009 ◽  
Vol 32 (10) ◽  
pp. 901-905 ◽  
Author(s):  
Katsuko Miyanaga ◽  
Keisuke Fukuo ◽  
Hiroshi Akasaka ◽  
Tomohiro Katsuya ◽  
Rumi Fukada ◽  
...  
Keyword(s):  
Angiotensin Ii ◽  
Receptor Gene ◽  
Japanese Women ◽  
Plasma Adiponectin ◽  
A1166c Polymorphism ◽  
Young Japanese Women

scholarly journals Habituation of thermal sensations, skin temperatures, and norepinephrine in men exposed to cold air

2001 ◽  
Vol 90 (4) ◽  
pp. 1211-1218 ◽  
Author(s):  
J. Leppäluoto ◽  
I. Korhonen ◽  
J. Hassi
Keyword(s):  
Cold Exposure ◽  
Thyroid Stimulating Hormone ◽  
Cold Sensation ◽  
Total Proteins ◽  
Cold Air ◽  
Cold Environments ◽  
Before And After ◽  
Total Thyroxine ◽  
Sympathetic Nervous ◽  
Skin Temperatures

We studied habituation processes by exposing six healthy men to cold air (2 h in a 10°C room) daily for 11 days. During the repeated cold exposures, the general cold sensations and those of hand and foot became habituated so that they were already significantly less intense after the first exposure and remained habituated to the end of the experiment. The decreases in skin temperatures and increases in systolic blood pressure became habituated after four to six exposures, but their habituations occurred only at a few time points during the 120-min cold exposure and vanished by the end of the exposures. Serum thyroid-stimulating hormone, total thyroxine and triiodothyronine, norepinephrine, epinephrine, cortisol, and total proteins were measured before and after the 120-min cold exposure on days 0, 5, and 10. The increase in norepinephrine response became reduced on days 5 and 10 and that of proteins on day 10, suggesting that the sympathetic nervous system became habituated and hemoconcentration became attenuated. Thus repeated cold-air exposures lead to habituations of cold sensation and norepinephrine response and to attenuation of hemoconcentration, which provide certain benefits to those humans who have to stay and work in cold environments.

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