Groups of young healthy men were studied during 36- and 48-hour simulated flights in which they performed on psychomotor measuring devices, using a 2-hour work/rest schedule. Physiologic cost was assessed by use of a battery of urinary techniques, including potassium, sodium, urea, 17-OHCS, and, in some cases, individual 17-ketosteroids. Comparison was made of responses to uncomplicated flight, flight complicated by environmental dryness, flight complicated by 8,000-ft pressure altitude, and flight complicated by dryness and altitude. Altitude had intensifying influence, but dryness tended to counteract some phases of the stress response. In combination, altitude and dryness in certain physiologic respects acted in a depressant manner. Complete recovery from such prolonged effort required more than 2 days. (Modified author abstract)
Physiological Cost in 36- and 48-Hour Simulated Flights
1973
13 pages
Report
No indication
English
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