NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effects of chronic acceleration on body compositionStudies of the centrifugation of adult rats showed an unexpected decrease in the mass of fat-free muscle and bone, in spite of the added load induced by centrifugation. It is suggested that the lower but constant fat-free body mass was probably regulated during centrifugation. Rats placed in weightless conditions for 18.5 days gave indirect but strong evidence that the muscle had increased in mass. Other changes in the rats placed in weightless conditions included a smaller fraction of skeletal mineral, a smaller fraction of water in the total fat-free body, and a net shift of fluid from skin to viscera. Adult rats centrifuged throughout the post-weaning growth period exhibited smaller masses of bone and central nervous system (probably attributable to slower growth of the total body), and a larger mass of skin than controls at 1 G. Efforts at simulating the effects of weightlessness or centrifugation on the body composition of rats by regimens at terrestrial gravity were inconclusive.
Document ID
19830046562
Document Type
Reprint (Version printed in journal)
Authors
Pitts, G. C. (Virginia, University Charlottesville, VA, United States)
Date Acquired
August 11, 2013
Publication Date
December 1, 1982
Subject Category
LIFE SCIENCES (GENERAL)
Funding Number(s)
CONTRACT_GRANT: NAS2-1554
CONTRACT_GRANT: NGR-47-005-213
CONTRACT_GRANT: NAS2-10195
CONTRACT_GRANT: NSG-225
Distribution Limits
Public
Copyright
Other