Document Detail

Blood lactate during leg exercise in microgravity.
MedLine Citation:
PMID:  11537599     Owner:  NASA     Status:  MEDLINE    
Venous blood lactate concentration ([La]b) was measured in five male subjects (age: 30-50 years; BW: 72-84 kg, VO2max:2.2-3.6 l min-1) during cycloergometric exercise in microgravity obtained by parabolic flight maneuvers of approximately 25 s duration. The subject(s) exercised at 30, 60, 90 and 120 W (60 RPM) for at least 7 min at each intensity. Three consecutive parabolas with approximately 3 min interval were performed at each workload. [La]b was determined at rest and immediately after 60, 90 and 120 W exercise. The day after the flight experiments, the subject(s) underwent the same experimental protocol on the ground and the blood samples were taken at the very same time intervals as on the aircraft. [La]b in flight and control didn't show any appreciable difference once the values are plotted as a function of the relative exercise intensities expressed as a percent of the individual VO2max corrected for the moderate hypoxia prevailing inside the aircraft (cabin barometric pressure = 590 mmHg).
P Zamparo; C Capelli; G Antonutto
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta astronautica     Volume:  27     ISSN:  0094-5765     ISO Abbreviation:  Acta Astronaut     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1997-10-04     Completed Date:  1997-10-04     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9890631     Medline TA:  Acta Astronaut     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  61-4     Citation Subset:  S    
Institute of Biology, School of Medicine, Udine, Italy.
Space Flight Mission:
Flight Experiment; Parabolic Flight; manned; short duration
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MeSH Terms
Exercise / physiology*
Heart Rate / physiology
Lactic Acid / blood*
Middle Aged
Oxygen Consumption / physiology
Respiration / physiology
Space Flight*
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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