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Energy and thermal regulation during bed rest and spaceflightThis paper presents data available from bed-rest and flight studies on the energy metabolism and thermoregulatory parameters and their changes during long-duration space missions which may influence requirements of astronauts for food and water. It is calculated, on the basis of 3100 kcal and 2.2 l water a day, with 1 h/day moderate exercise, that the requirements for a 2-yr flight would be 2,263,000 kcal and 1606 l water for each astronaut. One daily 5-h-long extravehicular sortie would require an additional 529,250 kcal and 1,095 l of water per year. Changes in the efficiency of work or metabolism would affect these nutritional requirements for long spaceflights. Factors that would increase food and water requirements are discussed.
Document ID
19890064380
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Greenleaf, John E.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1989
Publication Information
Publication: Journal of Applied Physiology
Volume: 67
ISSN: 0161-7567
Subject Category
Aerospace Medicine
Accession Number
89A51751
Distribution Limits
Public
Copyright
Other

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