Document Detail

Optimum sampling times for maximum blood lactate levels after exposures to sustained +Gz.
MedLine Citation:
PMID:  3355467     Owner:  NLM     Status:  MEDLINE    
Six male subjects wearing anti-G suits were exposed to +4.5 Gz and +4.5-7 Gz simulated aerial combat maneuvers (SACM), sustained until terminated because of fatigue. Before and after each G exposure, venous blood was withdrawn (using the finger-prick method) and analyzed for lactate concentration. Five samples were taken serially, at 1, 3, 6, 10, and 20 min after each G exposure to determine the maximum (peak) level of blood lactate. Individual lactate levels varied, with peaks at 1, 3, and 6 min; however, group levels were maximum at 3 min after the G exposure. Maximum lactate levels (mean +/- S.D.) of 27.8 +/- 11.3 mg% and 42.7 +/- 19.4 mg% were found for the 4.5-G and SACM exposures, respectively. Lactate recoveries were a simple exponential function, with a half life of approximately 10 min. The relationship between these data, following G exposure, and those measured after aerobic physical activities, is discussed.
A Tamir; R R Burton; E M Forster
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Aviation, space, and environmental medicine     Volume:  59     ISSN:  0095-6562     ISO Abbreviation:  Aviat Space Environ Med     Publication Date:  1988 Jan 
Date Detail:
Created Date:  1988-05-06     Completed Date:  1988-05-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7501714     Medline TA:  Aviat Space Environ Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  54-6     Citation Subset:  IM; S    
Crew Technology Division, USAF School of Aerospace Medicine, Brooks Air Force Base, TX 78235-5301.
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MeSH Terms
Gravity Suits
Lactates / blood*
Lactic Acid
Specimen Handling*
Time Factors
United States
Reg. No./Substance:
0/Lactates; 50-21-5/Lactic Acid

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