Document Detail


Evaluating physiological strain during cold exposure using a new cold strain index.
MedLine Citation:
PMID:  10444564     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A cold strain index (CSI) based on core (T(core)) and mean skin temperatures (T(sk)) and capable of indicating cold strain in real time and analyzing existing databases has been developed. This index rates cold strain on a universal scale of 0-10 and is as follows: CSI = 6.67(T(core t) - T(core 0)). (35 - T(core 0))(-1) + 3.33(T(sk (t)) - T(sk 0)). (20 - T(sk 0))(-1), where T(core 0) and T(sk 0) are initial measurements and T(core t) and T(sk t) are simultaneous measurements taken at any time t; when T(core t) > T(core 0), then T(core t) - T(core 0) = 0. CSI was applied to three databases. The first database was obtained from nine men exposed to cold air (7 degrees C, 40% relative humidity) for 120 min during euhydration and two hypohydration conditions achieved by exercise-heat stress-induced sweating or by ingestion of furosemide 12 h before cold exposure. The second database was from eight men exposed to cold air (10 degrees C) immediately on completion of 61 days of strenuous outdoor military training, 48 h later, and after 109 days. The third database was from eight men repeatedly immersed in 20 degrees C water three times in 1 day and during control immersions. CSI significantly differentiated (P < 0.01) between the trials and individually categorized the strain of the subject for two of these three databases. This index has the potential to be widely accepted and used universally.
Authors:
D S Moran; J W Castellani; C O'Brien; A J Young; K B Pandolf
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  277     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1999 Aug 
Date Detail:
Created Date:  1999-09-23     Completed Date:  1999-09-23     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  R556-64     Citation Subset:  IM    
Affiliation:
United States Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760-5007, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Body Temperature
Body Temperature Regulation / physiology
Body Water / metabolism
Cold Temperature*
Databases as Topic
Diuretics / pharmacology
Exercise / physiology
Furosemide / pharmacology
Hot Temperature
Humans
Humidity
Immersion
Male
Rectum / physiopathology
Skin Temperature
Stress, Physiological / etiology*,  physiopathology*
Sweating
Temperature Sense / physiology
Chemical
Reg. No./Substance:
0/Diuretics; 54-31-9/Furosemide

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