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Body composition changes in men and women after 2-3 weeks of bed restSeveral parameters of body composition were measured in eight men before and after 14 days of continuous recumbency, and in eight women before and after 17 days of recumbency. The parameters measured included body weight, body water, body potassium, plasma volume, and plasma protein concentrations. From these, values were derived for body fat content, lean body mass, body mass, and circulating plasma proteins. In general, the men and women responded similarly to continuous recumbency. Characteristically, there was significant reduction of plasma volume and body potassium in both groups. The women showed a significant reduction in circulating plasma protein, entirely in the albumin fraction; a similar change was observed in the men. The women, but not the men, showed a significant increase in circulating fibrinogen. Both men and women lost body cell mass, while body fat content remained the same or tended to increase slightly. It is expected that similar changes would occur in weightlessness. It is further concluded that women should tolerate the weightlessness of space flight physiologically as well as men.
Document ID
19770041310
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Pace, N.
(California Univ. Berkeley, CA, United States)
Kodama, A. M.
(California Univ. Berkeley, CA, United States)
Grunbaum, B. W.
(California Univ. Berkeley, CA, United States)
Rahlmann, D. F.
(California, University Berkeley, Calif., United States)
Price, D. C.
(NASA Ames Research Center Moffett Field, Calif., United States)
Newsom, B. D.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Aerospace Medicine
Meeting Information
Meeting: Open Meeting of the Working Group on Space Biology
Location: Varna
Country: Bulgaria
Start Date: May 29, 1975
End Date: June 7, 1975
Accession Number
77A24162
Funding Number(s)
CONTRACT_GRANT: NGR-05-003-470
Distribution Limits
Public
Copyright
Other

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