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Body mass, energy intake, and water consumption of rats and humans during space flightAlteration of metabolism has been suggested as a major limiting factor to long-term space flight. In humans and primates, a negative energy balance has been reported. The metabolic response of rats to space flight has been suggested to result in a negative energy balance. We hypothesized that rats flown in space would maintain energy balance as indicated by maintenance of caloric intake and body mass gain. Further, the metabolism of the rat would be similar to that of laboratory-reared animals. We studied the results from 15 space flights lasting 4 to 19 d. There was no difference in average body weight (206 +/- 13.9 versus 206 +/- 14.8 g), body weight gain (5.8 +/- 0.48 versus 5.9 +/- 0.56 g/d), caloric intake (309 +/- 21.0 versus 309 +/- 20.1 kcal/kg of body mass per day), or water intake (200 +/- 8.6 versus 199 +/- 9.3 mL/kg of body mass per day) between flight and ground control animals. Compared with standard laboratory animals of similar body mass, no differences were noted. The observations suggested that the negative balance observed in humans and non-human primates may be due to other factors in the space-flight environment.
Document ID
20040088080
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wade, C. E.
(NASA Ames Research Center Moffett Field CA United States)
Miller, M. M.
Baer, L. A.
Moran, M. M.
Steele, M. K.
Stein, T. P.
Date Acquired
August 21, 2013
Publication Date
October 1, 2002
Publication Information
Publication: Nutrition (Burbank, Los Angeles County, Calif.)
Volume: 18
Issue: 10
ISSN: 0899-9007
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
STS Shuttle Project
Apollo Project
Skylab Project
Mir Project
short duration
long duration
manned
Flight Experiment
NASA Discipline Regulatory Physiology
NASA Center ARC

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