Document Detail

Importance of dynamics of sweating in men during exercise.
MedLine Citation:
PMID:  2136319     Owner:  NLM     Status:  MEDLINE    
Influence of dynamics of sweating on rectal temperature increase was tested in 3 groups of men performing cycle exercise with intensity of 65, 90 and 120 W, respectively, in 22 degrees C chamber temperature and 30% of relative air humidity. During exercise at 65 and 90 W the subjects wore suits while exercising with intensity of 120 W they wore only shorts. The dynamics of sweating was described by delay in onset of sweating and time constant of the reaction. Wearing caused significant increase in skin humidity and decreased evaporative rate of sweating. Sweat rate during steady state was related to the metabolic rate in naked (r = 0.89, p less than 0.002) as well as in wearing subjects (r = 0.93, p less than 0.01). Delay in onset of sweating was, in average, 5 min with a time constant of 7 min. Both factors showed a tendency to be shorter with increasing work intensity. Mean increase in rectal temperature was proportional to the intensity of exercise although the individual delta Tre correlated well with the dynamics of sweating in naked (r = 0.83, p less than 0.01) and wearing subjects (r = 0.84, p less than 0.01). Since delta Tre was smaller in subjects with shorter inertia time of sweating in response to beginning of exercise at the same intensity it is concluded that the dynamics of sweating can play an important role in limiting body temperature increase in working men.
R Grucza; O Hänninen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta physiologica Polonica     Volume:  41     ISSN:  0044-6033     ISO Abbreviation:  Acta Physiol Pol     Publication Date:    1990 Nov-Dec
Date Detail:
Created Date:  1992-08-31     Completed Date:  1992-08-31     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  2985166R     Medline TA:  Acta Physiol Pol     Country:  POLAND    
Other Details:
Languages:  eng     Pagination:  65-75     Citation Subset:  IM    
Department of Applied Physiology, Polish Academy of Sciences, Warsaw.
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MeSH Terms
Body Temperature / physiology
Exercise / physiology*
Skin Temperature / physiology
Sweating / physiology*

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