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Tolerance of females to +Gz centrifugation before and after bedrestBecause women may be included as passengers in the proposed Space Shuttle System, experiments were conducted on 12 female subjects aged 24-35 yr to investigate the +Gz tolerance of women and the possible degradation of this tolerance after a period of weightlessness as simulated by bedrest. Over a 1-week period, each subject was exposed to +Gz levels starting at +2 Gz and increasing by 0.5 Gz increments to a gray-out point. This point was determined by peripheral vision loss with a standard lightbar and by reverse blood flow in the temporal artery. Ultimately, each woman was subjected to three runs at the +3 Gz level for about 55 min long each, separated by 5-min rest periods. Eight subjects with the best tolerance times were selected for 14 days of bedrest in a horizontal position; the other four being ambulatory controls. Tests before bedrest, immediately following, and 5 d later showed that average +Gz tolerance decreased by 67% after bedrest.
Document ID
19770048029
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Newsom, B. D.
(NASA Ames Research Center Moffett Field, CA, United States)
Goldenrath, W. L.
(NASA Ames Research Center Moffett Field, CA, United States)
Sandler, H.
(NASA Ames Research Center Moffett Field, Calif., United States)
Winter, W. R.
(NASA Ames Research Center Moffett Field; NASA, Flight Research Center, Edwards, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1977
Subject Category
Aerospace Medicine
Accession Number
77A30881
Distribution Limits
Public
Copyright
Other

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