Effects of acute mild and moderate hypoxia on human mood state.
OBJECTIVE
To explore the effects of acute mild and moderate hypoxia on human mood state.


METHODS
The mood states of 18 healthy male volunteers were evaluated by self-assessment questionnaires, profile of mood state (POMS) and state anxiety inventory (S-AI) after random exposure to simulated altitude of 300 m (control), 2800 m, 3600 m and 4400 m for 1 h in a hypobaric chamber.


RESULTS
The data at 300 m level were taken as the baseline control. The negative mood state factor points (tension, fatigue etc.) increased gradually as the altitude level increased while V (vigor-activity) points had a tendency to decrease (P<0.05 or P<0.01). No significant difference was found in the points of (D, A) even under exposure to 4400 m (P>0.05). At the early period of 2800 m exposure the tension points of POMS and S-AI scores were higher than those of control level (P<0.05) then dropped to baseline level when exposure to this altitude for 1 h.


CONCLUSIONS
Exposure to acute mild hypobaric hypoxia at 2800 m for 1 h has adverse effect on mood state of healthy person and the negative effect was further aggravated with the increment of altitude level.
Li
X Y
XY
Department of Aerospace Medicine (DAM), Fourth Military Medical University, Xi'an.
Wu
X Y
XY
Fu
C
C
Shen
X F
XF
Wu
Y H
YH
Wang
T
T
D000293:Adolescent; D000337:Aerospace Medicine; D000339:Affect; D000531:Altitude; D001007:Anxiety; D001273:Atmosphere Exposure Chambers; D001274:Atmospheric Pressure; D001359:Aviation; D002681:China; D006801:Humans; D000860:Hypoxia / Q000523:psychology*; D008297:Male; D008889:Military Personnel / Q000523:psychology; D011581:Psychological Tests; D011795:Surveys and Questionnaires