Document Detail


Thermoregulatory responses of young and older men to cold exposure.
MedLine Citation:
PMID:  1483436     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Nine young (20-25 years) and ten older (60-71 years) men, matched for body fatness and surface area:mass ratio, underwent cold tests in summer and winter. The cold tests consisted of a 60-min exposure, wearing only swimming trunks, to an air temperature of 17 degrees C (both seasons) and 12 degrees C (winter only). Rectal (Tre) and mean skin (Tsk) temperatures, metabolic heat production (M), systolic (BPs) and diastolic (BPd) blood pressures and heart rate (fc) were measured. During the equilibrium period (28 degrees C air temperature) there were no age-related differences in Tre, Tsk, BPs, BPd, or fc regardless of season, although M of the older men was significantly lower (P < 0.003). The decrease in Tre and Tsk (due to the marked decrease in six of the older men) and the increase in BPs and BPd were significantly greater (P < 0.004) for the older men during all the cold exposures. The rate of increase in M was significantly greater (P < 0.01) for the older group when exposed to 12 degrees C in winter and 17 degrees C in summer (due to the marked increase in four of the older men). This trend was not apparent during the 17 degrees C exposure in winter. There was no age-related difference in fc during the exposures. Significant decreases in Tre and Tsk and increases in M, BPs and BPd during the 12 degrees C exposure were observed for the older group (P < 0.003) compared to their responses during the 17 degrees C exposure in winter. In contrast, Tre, M, BPs in the young group were not affected as much by the colder environment. It was concluded that older men have more variable responses and some appear more or less responsive to mild and moderate cold air than young men.
Authors:
Y Inoue; M Nakao; T Araki; H Ueda
Related Documents :
2744866 - Heart rate variation and serum dopamine-beta-hydroxylase activity in workers exposed to...
2546756 - Plasma lipid peroxides among workers exposed to silica or asbestos dusts.
20160966 - Immigration and the american industrial revolution from 1880 to 1920.
4023586 - Study of respiratory and immunologic changes in the workers of a poultry farm.
21123626 - Time trends in the prevalence of headache disorders. the nord-trondelag health studies ...
20847446 - Longitudinal changes in fiber tract integrity in healthy aging and mild cognitive impai...
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  65     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1992  
Date Detail:
Created Date:  1993-02-16     Completed Date:  1993-02-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  492-8     Citation Subset:  IM    
Affiliation:
Department of Hygiene, Kobe University School of Medicine, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / physiology
Adult
Aged
Aging / physiology*
Blood Pressure / physiology
Body Composition / physiology
Body Surface Area
Body Temperature Regulation / physiology*
Body Weight / physiology
Cold Temperature*
Heart Rate / physiology
Humans
Male
Middle Aged
Oxygen Consumption / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Marathon running: physiological and chemical changes accompanying late-race functional deterioration...
Next Document:  Influence of body position and pre-exercise activity on cardiac output and oxygen uptake following s...