Comparative studies of moderate and high altitude stress on humans: studies on plasma T3, T4, TSH and cortisol levels

Abstract

Studies have been carried out on plasma T3, T4, TSH and cortisol levels of 15 male Indian sea level dwelling students at a moderate altitude (2200 m) and at high altitude (5100 m). Plasma T3, T4 and cortisol levels of the subjects increased significantly at the second day at high altitude in comparison to the moderate altitude. Plasma TSH level at high altitude remained unchanged in comparison to the moderate altitude base data. On acclimatization of the subjects from a high to a moderate altitude, the studied plasma T3, T4 and cortisol levels of the subjects reverted to the values as observed at a moderate altitude.