Word: bedrest
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Dates: during 1970-1979
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...prime concern of the experimenters was the effect of weightlessness on the circulatory system, particularly the tendency of the heart to grow "lazy" in space. Thus after bedrest, which is intended to simulate zero gravity, the adaptability of the nurses' circulatory system was tested by placing a bag tightly around the lower body and pumping the air out. This created a partial vacuum, which tends to concentrate the blood in the lower part of the body and to create the effects of gravity on astronauts who have just returned to earth. The bed rest was also followed by placing...