Human tolerance to high, sustained +G z  acceleration.
D000054:Acceleration; D000328:Adult; D000337:Aerospace Medicine; D001145:Arrhythmias, Cardiac / Q000209:etiology; D004562:Electrocardiography; D006112:Gravitation; D006339:Heart Rate; D006801:Humans; D008297:Male; D011482:Protective Devices; D013575:Syncope / Q000209:etiology; D013997:Time Factors; D014786:Vision Disorders / Q000209:etiology