Document Detail


Energy expenditure during antiorthostatic bed rest (simulated microgravity).
MedLine Citation:
PMID:  7665419     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Few studies have addressed the interaction between energy balance and lean body mass in healthy subjects during spaceflight or its simulations. We used doubly labeled water to measure total energy expenditure (TEE) in nine healthy adult men during two 7-day periods, once before and once during a 10-day head-down bed-rest period. Mean TEE was 21% less during than before bed rest; however, neither basal (BEE) nor resting (REE) energy expenditures changed, implying that the lesser TEE resulted from a reduction in physical activity. During the bed-rest period, energy intake was 563 +/- 280 kcal/day higher than TEE (P < 0.05) but body weight, fluid balance, BEE, and REE did not change relative to before bed rest. However, the small but statistically significant increase in body fat (0.44 +/- 0.67 kg, P < 0.05) during the bed-rest period suggests that body weight alone does not accurately reflect changes in energy balance during antiorthostatic bed rest.
Authors:
R J Gretebeck; D A Schoeller; E K Gibson; H W Lane
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  78     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1995 Jun 
Date Detail:
Created Date:  1995-10-11     Completed Date:  1995-10-11     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2207-11     Citation Subset:  IM; S    
Affiliation:
Nutritional Biochemistry and Stable Isotope Laboratories, National Aeronautics and Space Administration, Johnson Space Center, Houston, Texas 77058, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Bed Rest*
Body Weight
Drinking
Eating
Energy Metabolism*
Female
Humans
Male
Time Factors
Water
Weightlessness*
Chemical
Reg. No./Substance:
7732-18-5/Water
Investigator
Investigator/Affiliation:
H W Lane / NASA JSC

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


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