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The effect of age and acclimation on...

Armstrong, Curtis Glenn, Jr.

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The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients./
作者:	Armstrong, Curtis Glenn, Jr.
面頁冊數:	149 p.
附註:	Source: Dissertation Abstracts International, Volume: 52-12, Section: B, page: 6251.
Contained By:	Dissertation Abstracts International52-12B.
標題:	Biology, Animal Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9214102

The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients.
Armstrong, Curtis Glenn, Jr.

The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients. - 149 p.

Source: Dissertation Abstracts International, Volume: 52-12, Section: B, page: 6251.

Thesis (Ph.D.)--The Pennsylvania State University, 1991.

Six older (61 Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients.
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035 $a (UnM)AAI9214102
035 $a AAI9214102
040 $a UnM $c UnM
100 1 $a Armstrong, Curtis Glenn, Jr. $3 1940036
245 1 4 $a The effect of age and acclimation on thermoregulatory responses during warm and cold thermal transients.
300 $a 149 p.
500 $a Source: Dissertation Abstracts International, Volume: 52-12, Section: B, page: 6251.
500 $a Adviser: W. Larry Kenney.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1991.
520 $a Six older (61 $\ pm $ 1 yr, mean $\ pm $ SEM) and 6 younger (26 $\ pm $ 2 yr) men matched for VO $\ sb2 $m ax, percent body fat, surface area to mass ratio, and thickness of subcutaneous fat were exposed to warm and cold thermal transients. During each test the subjects were seated in a thermoneutral environment (28 $\ sp\circ $\ sp\circ $\ sp\circ $\ sp\circ $\ sb{\rm re} $) , mean skin temperature (T $\ sb{\rm sk} $) , mean body temperature (T $\ sb{\rm ws} $) , heart rate (HR), forearm blood flow (FBF), whole body sweat rate (M $\ sb{\rm sw} $) , local sweat rate (m $\ sb{\rm sw} $) , and rating of thermal sensation (RTS). There were no age-related differences before or after acclimation in T $\ sb{\rm re} $, T $\ sb{\rm sk} $, T $\ sb{\rm ws} $, or HR responses to warm or cold stress. Before and after heat acclimation threshold responses showed no differences related to age in either the warm or cold tests. After acclimation a significant (p $< $. 05) resetting of the central thermoregulatory temperature for both warm and cold responses occurred and was independent of age. The FBF:T $\ sb{\rm re} $ slope was significantly lower (p.05) both before and after acclimation in the older group. The m $\ sb{\rm sw} $ also showed significant age differences before and after acclimation with the older men lower. Both age groups had significant m $\ sb{\rm sw} $ increases after acclimation, with the older men's postacclimation m $\ sb{\rm sw} $ almost equalling the younger men's preacclimation rate. Three conclusions were reached. First, when critical physiological and morphological variables are controlled, older men physiologically tolerate warm and cold stress as well as younger men. Second, age-related differences in thermoregulatory responses that do exist seem to be peripheral in nature (e.g. FBF:T $\ sb{\rm re} $ slope). Third, heat acclimation causes a readjustment to a lower control thermoregulatory temperature for both warm and cold stress that is independent of age.
590 $a School code: 0176.
650 4 $a Biology, Animal Physiology. $3 1017835
690 $a 0433
710 2 0 $a The Pennsylvania State University. $3 699896
773 0 $t Dissertation Abstracts International $g 52-12B.
790 1 0 $a Kenney, W. Larry, $e advisor
790 $a 0176
791 $a Ph.D.
792 $a 1991
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9214102