Thermoregulatory responses of young and older men to cold exposure

1992 ◽  
Vol 65 (6) ◽  
pp. 492-498 ◽  
Author(s):  
Yoshimitsu Inoue ◽  
Mikio Nakao ◽  
Tsutomu Araki ◽  
Hiroyuki Ueda
Keyword(s):  
Cold Exposure ◽  
Older Men ◽  
Thermoregulatory Responses

Effects of cold exposure and exercise intensity on metabolic and thermoregulatory responses

2020 ◽  
Vol 3 (5) ◽  
pp. 464-472
Author(s):  
Brittany Followay ◽  
Yongsuk Seo ◽  
Jeremiah Vaughan ◽  
Ellen L. Glickman ◽  
Adam R. Jajtner
Keyword(s):  
Cold Exposure ◽  
Exercise Intensity ◽  
Thermoregulatory Responses

scholarly journals The potential role of irisin in the thermoregulatory responses to mild cold exposure in adults

2016 ◽  
Vol 28 (5) ◽  
pp. 699-704 ◽  
Author(s):  
Emily K. Calton ◽  
Mario J. Soares ◽  
Anthony P. James ◽  
Richard J. Woodman
Keyword(s):  
Cold Exposure ◽  
Potential Role ◽  
Thermoregulatory Responses

SEASONAL ENERGY EXPENDITURES AND THERMOREGULATORY RESPONSES OF BISON AND CATTLE

1979 ◽  
Vol 59 (3) ◽  
pp. 611-617 ◽  
Author(s):  
R. J. CHRISTOPHERSON ◽  
R. J. HUDSON ◽  
M. K. CHRISTOPHERSEN
Keyword(s):  
Cold Exposure ◽  
Low Temperatures ◽  
Metabolic Rates ◽  
Heart Rates ◽  
Ambient Temperatures ◽  
Energy Expenditures ◽  
Thermoregulatory Responses ◽  
Air Temperatures ◽  
Wind Velocities

The metabolic rates of two bison and four Hereford spring-born calves were measured at monthly intervals from December until the following November. Following adaptation at seasonal ambient temperatures, metabolic measurements were made while calves were exposed to controlled temperatures of +10, 0 and −30 °C. Exposure of the Hereford calves to −30 °C resulted in increased metabolic rates during the first 6 mo of the study but the magnitude of the response was greatly attenuated as the calves grew larger. At −30 °C, bison calves either maintained or reduced metabolic rates compared to expenditures at +10 °C. When the calves were about 17 mo of age, they were exposed to a combination of low temperatures and wind. Wind velocities of 4.7 km∙h−1 did not influence metabolic rates of either bison or Herefords at air temperatures of 0 °C. However, at −30 °C, metabolic rates increased from 650 and 700 KJ∙kg−.75∙d−1 to 835 and 950 KJ∙kg−.75∙d−1 in Hereford and bison calves, respectively. Neither respiratory frequencies nor heart rates were influenced significantly during cold exposure, but heart rates increased in response to wind. In general, metabolic rates and heart rates were lower in bison calves.

scholarly journals Effects of acute hypobaric hypoxia on thermoregulatory and circulatory responses during cold air exposure

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Sora Shin ◽  
Yoshiki Yasukochi ◽  
Hitoshi Wakabayashi ◽  
Takafumi Maeda
Keyword(s):  
Pulse Rate ◽  
Cold Exposure ◽  
Hypobaric Hypoxia ◽  
Total Duration ◽  
Negative Relationship ◽  
Barometric Pressure ◽  
Experimental Conditions ◽  
Simultaneous Exposure ◽  
Air Exposure ◽  
Thermoregulatory Responses

Abstract Background The thermoregulatory responses during simultaneous exposure to hypoxia and cold are not well understood owing to the opposite reactions of vasomotor tone in these two environments. Therefore, the purpose of this study was to investigate the influences of hypobaric hypoxia on various thermoregulatory responses, including skin blood flow (SkBF) during cold exposure. Methods Ten subjects participated in two experimental conditions: normobaric normoxia with cold (NC, barometric pressure (PB) = 760 mmHg) and hypobaric hypoxia with cold (HC, PB = 493 mmHg). The air temperature was maintained at 28 °C for 65 min and gradually decreased to 19 °C for both conditions. The total duration of the experiment was 135 min. Results The saturation of percutaneous oxygen (SpO2) was maintained at 98–99% in NC condition, but decreased to around 84% in HC condition. The rectal and mean skin temperatures showed no significant differences between the conditions; however, the forehead temperature was higher in HC condition than in NC condition. The pulse rate increased in HC condition, and there was a strong negative relationship between SpO2 and pulse rate (r = − 0.860, p = 0.013). SkBF and blood pressure showed no significant differences between the two conditions. Conclusion These results suggest that hypobaric hypoxia during cold exposure did not alter the overall thermoregulatory responses. However, hypobaric hypoxia did affect pulse rate regardless of cold exposure.

Effects Of Aspirin On Thermoregulatory Responses In Males During Acute Cold Exposure

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S212-S213
Author(s):  
Ronald Otterstetter ◽  
Leigh Murray ◽  
Michael Kalinski ◽  
Ellen L. Glickman
Keyword(s):  
Cold Exposure ◽  
Acute Cold Exposure ◽  
Thermoregulatory Responses

Influences of age and gender on human thermoregulatory responses to cold exposures

1985 ◽  
Vol 58 (1) ◽  
pp. 180-186 ◽  
Author(s):  
J. A. Wagner ◽  
S. M. Horvath
Keyword(s):  
Older Women ◽  
Body Fat ◽  
Young Women ◽  
Cold Exposure ◽  
Physiological Responses ◽  
Metabolic Cost ◽  
Older Men ◽  
Age And Gender ◽  
Younger Women ◽  
And Gender

To delineate age- and gender-related differences in physiological responses to cold exposure, men and women between the ages of 20 and 29 yr and 51 and 72 yr, wearing minimal clothing, were exposed at rest for 2 h to 28, 20, 15, and 10 degrees C room temperatures with 40% relative humidity. During the coldest exposure, the rates of increase in metabolic rate (W X m-2 or ml X kg lean body mass-1 X min-1 were similar for all groups. However, older women (n = 7) may have benefited from a larger (P less than 0.05) early metabolic (M) increase (40% within 15 min) than young men (18%) (n = 10), young women (5%) (n = 10), or older men (5%) (n = 10). A similar rapid M response in older women occurred during the 15 degrees C exposure. During all cold exposures, older women maintained constant rectal temperature (Tre) and young women maintained Tre only during the 20 degrees C exposures, whereas Tre of the men declined during all cold exposures (P less than 0.01). Changes in Tre and mean skin temperature (Ts) during cold exposure were largely related to body fat, although age and surface area/mass modified the changes in men. The data suggest that older men are more susceptible to cold ambients than younger people, since they did not prevent a further decline in their initially relatively low Tre. Despite greater insulation from body fat, the older women maintained a constant Tre at greater metabolic cost than men or younger women.

THE EFFECTS OF NICOTINE ON THE THERMOREGULATORY RESPONSES DURING ACUTE COLD EXPOSURE

2001 ◽  
Vol 33 (5) ◽  
pp. S161
Author(s):  
C C. Cheatham ◽  
N Caine ◽  
M Blegen ◽  
E S. Potkanowicz ◽  
E L. Glickman
Keyword(s):  
Cold Exposure ◽  
Acute Cold Exposure ◽  
Thermoregulatory Responses

Effects Of Sleep Deprivation On The Thermoregulatory Responses During Recovery From Acute Cold Exposure

2009 ◽  
Vol 41 ◽  
pp. 57
Author(s):  
Tiffany A. Collinsworth ◽  
Katherine E. Pierce ◽  
Judith A. Juvancic-Heltzel ◽  
Jacob E. Barkley ◽  
Gary H. Kamimori ◽  
...  
Keyword(s):  
Sleep Deprivation ◽  
Cold Exposure ◽  
Acute Cold Exposure ◽  
Thermoregulatory Responses

Modification of thermoregulatory responses to cold by hypnosis

1964 ◽  
Vol 19 (6) ◽  
pp. 1043-1050 ◽  
Author(s):  
Abbott T. Kissen ◽  
Clifford B. Reifler ◽  
Victor H. Thaler
Keyword(s):  
Heart Rate ◽  
Thermal Stress ◽  
Task Performance ◽  
Cold Exposure ◽  
Sympathetic Activity ◽  
Sympathetic Nerve Activity ◽  
Skin Resistance ◽  
Vigilance Task ◽  
Nerve Activity ◽  
Thermoregulatory Responses

The effects of hypnosis on thermoregulatory responses were studied in nonacclimatized acutely cold-exposed men. Forty exposures (4.5 @#X2013;5.0 C) were conducted in an environmental chamber under both hypnosis and nonhypnosis conditions. Five subjects, wearing 1 clo insulation, were cold exposed for 1 hr, four times for each condition, and each subject served as his own control. Variables monitored included mean skin and rectal temperatures, heart and shivering rates, basal skin resistance, and vigilance task performance. In hypnosis, shivering was suppressed, heart rate lowered, and vigilance task performance improved. Basal skin resistance differed in terms of pattern and level, being generally higher under hypnotic conditions. Rectal temperatures were lower despite maintaining skin temperature at the same level as during nonhypnosis conditions. These findings indicate that with the thermal stress imposed and levels of trance achieved, there is a general amelioration of the psychophysiological effects of the stress. The mechanism responsible for this form of “adaptation” remains speculative but is consistent with generalized suppression of sympathetic activity. thermoregulation; cold exposure; adaptation; sympathetic nerve activity; shivering; basal skin resistance; vigilance task performance Submitted on March 12, 1964

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