Effects of a gravity gradient on human cardiovascular responses.
Eight subjects participated in one control and three rotation trials on a short-arm centrifuge such that the Gz levels at the feet were 0.5, 1.0, and 1.5 G. Trials consisted of 30 minutes of supine rest, 1 hour of rotation (or in the control, 30 additional minutes of rest and 30 minutes of standing), and a final 30-minute rest period. Measurements of heart rate, calf impedance, calf volume, and blood pressure support the findings that the highest G level is similar to standing and that the lower G levels fail to produce significant effects.
Hastreiter
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Man-Vehicle Laboratory, Massachusetts Institute of Technology (MIT), USA.
Young
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D000328:Adult; D001794:Blood Pressure; D002498:Centrifugation; D005260:Female; D018470:Gravity, Altered; D006339:Heart Rate; D006801:Humans; D007866:Leg / Q000098:blood supply*; D008297:Male; D010992:Plethysmography, Impedance; D012039:Regional Blood Flow; D012399:Rotation; D016683:Supine Position; D014655:Vascular Resistance; D018544:Weightlessness Countermeasures