Document Detail


Influence of cold exposure on blood lactate response during incremental exercise.
MedLine Citation:
PMID:  2920719     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study examined the effect of acute exposure of the whole body to cold on blood lactate response during incremental exercise. Eight subjects were tested with a cycle ergometer in a climatic chamber, room temperature being controlled either at 24 degrees C (MT) or at -2 degrees C (CT). The protocol consisted of a step increment in exercise intensity of 30 W every 2 min until exhaustion. Oxygen consumption (VO2) was measured at rest and during the last minute of each exercise intensity. Blood samples were collected at rest and at exhaustion for estimations of plasma norepinephrine (NE), epinephrine (E), free fatty acid (FFA) and glucose concentrations, during the last 15 s of each exercise step and also during the 1st, 4th, 7th, and the 10th min following exercise for the determination of blood lactate (LA) concentration. The VO2 was higher during CT than during MT at rest and during nearly every exercise intensity. At CT, lactate anaerobic threshold (LAT), determined from a marked increase of LA above resting level, increased significantly by 49% expressed as absolute VO2, and 27% expressed as exercise intensity as compared with MT. The LA tended to be higher for light exercise intensities and lower for heavy exercise intensities during CT than during MT. The E and NE concentrations increased during exercise, regardless of ambient temperature. Furthermore, at rest and at exhaustion E concentrations did not differ between both conditions, while NE concentrations were greater during CT than during MT. Moreover, an increase off FFA was found only during CT.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
A Therminarias; P Flore; M F Oddou-Chirpaz; E Pellerei; A Quirion
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  58     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1989  
Date Detail:
Created Date:  1989-04-11     Completed Date:  1989-04-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  411-8     Citation Subset:  IM; S    
Affiliation:
Laboratoire de physiologie, Faculté de Médecine de Grenoble, La Tronche, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Anaerobic Threshold*
Cold Temperature*
Epinephrine / blood
Exercise Test
Fatty Acids, Nonesterified / blood
Humans
Lactates / blood*
Lactic Acid
Male
Norepinephrine / blood
Oxygen Consumption
Physical Exertion*
Respiration*
Chemical
Reg. No./Substance:
0/Fatty Acids, Nonesterified; 0/Lactates; 50-21-5/Lactic Acid; 51-41-2/Norepinephrine; 51-43-4/Epinephrine

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


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