Document Detail


Sweat lactate response between males with high and low aerobic fitness.
MedLine Citation:
PMID:  14551778     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Sweat lactate indirectly reflects eccrine gland metabolism. However the potential influence of aerobic fitness on sweat lactate is not well-understood. Six males with high aerobic fitness [peak oxygen consumption ( VO(2)peak): 61.6 (2.5) ml.kg(-1).min(-1)] and seven males with low aerobic fitness [ VO(2)peak: 41.8 (6.4) ml.kg(-1).min(-1)] completed a maximal exertion cycling trial followed on a different day by 60 min of cycling (60 rev.min(-1)) in a 30 degrees C wet bulb globe temperature environment. Intensity was individualized at 90% of the ventilatory threshold ( V(E)/ VO(2) increase with no concurrent V(E)/ VCO(2) increase). Sweat samples were collected from the lumbar region every 10 min and analyzed for lactate concentration. Sweat rate (SR) was significantly greater ( p<0.05) for subjects with a high [1445 (254) ml.h(-1)] versus a low [1056 (261) ml.h(-1)] fitness level. Also, estimated total lactate excretion (SRxmean sweat lactate concentration) was marginally greater ( p=0.2) in highly fit males. However, repeated measures ANOVA showed no significant differences ( p>0.05) between groups for sweat lactate concentration at any time point. Current results show highly fit (vs. low fitness level) males have a greater sweat rate which is consistent with previous literature. However aerobic fitness and subsequent variations in SR do not appear to influence sweat lactate concentrations in males.
Authors:
J M Green; R C Pritchett; T R Crews; J R McLester; D C Tucker
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-10-09
Journal Detail:
Title:  European journal of applied physiology     Volume:  91     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-12-23     Completed Date:  2004-11-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1-6     Citation Subset:  IM    
Affiliation:
Department of Physical Education and Recreation, Western Kentucky University, 1 Big Red Way, Bowling Green, KY 42101, USA. matt.green@wku.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Body Temperature Regulation
Eccrine Glands / chemistry
Humans
Lactic Acid / analysis*
Male
Physical Fitness / physiology*
Sweat / chemistry*
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid

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


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