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Induced venous pooling and cardiorespiratory responses to exercise after bed restVenous pooling induced by a specially constructed garment is investigated as a possible means for reversing the reduction in maximal oxygen uptake regularly observed following bed rest. Experiments involved a 15-day period of bed rest during which four healthy male subjects, while remaining recumbent in bed, received daily 210-min venous pooling treatments from a reverse gradient garment supplying counterpressure to the torso. Results of exercise testing indicate that while maximal oxygen uptake endurance time and plasma volume were reduced and maximal heart rate increased after bed rest in the control group, those parameters remained essentially unchanged for the group undergoing venous pooling treatment. Results demonstrate the importance of fluid shifts and venous pooling within the cardiovascular system in addition to physical activity to the maintenance of cardiovascular conditioning.
Document ID
19820049307
Document Type
Reprint (Version printed in journal)
Authors
Convertino, V. A. (NASA Ames Research Center Moffett Field, CA, United States)
Sandler, H. (NASA Ames Research Center Moffett Field, CA, United States)
Webb, P. (NASA Ames Research Center Moffett Field, CA, United States)
Annis, J. F. (NASA Ames Research Center Biomedical Research Div., Moffett Field, CA; Webb Associates, Yellow Springs, OH, United States)
Date Acquired
August 10, 2013
Publication Date
May 1, 1982
Publication Information
Publication: Journal of Applied Physiology: Respiratory
Subject Category
AEROSPACE MEDICINE
Distribution Limits
Public
Copyright
Other