Table 1. Effects of altitude and sleep treatment on mood states described by POMS-A.

	Day Effects		Treatment Effects		Day x Treatment		SL v HA
Mood	F	p	F	p	F	p	t	p
Tension	1.200	0.315	0.145	0.866	1.377	0.259	1.629	0.123
Depression	0.151	0.861	1.157	0.331	0.522	0.720	1.618	0.125
Anger	0.029	0.871	1.065	0.359	1.246	0.307	1.153	0.262
Fatigue	0.674	0.518	3.852	0.033*	2.548	0.053	2.101	0.052
Confusion	0.848	0.440	3.392	0.049*	2.518	0.059	3.615	0.002**
Vigor	2.288	0.120	0.505	0.609	1.397	0.253	0.416	0.683
TMD	1.074	0.356	2.374	0.112	1.823	0.142	1.980	0.063

Significance of day at altitude, sleep treatment, and their interaction effects on mood scores at high altitude, and significance of differences in mood states at high altitude (HA) versus sea level (SL) at p < 0.05 (*) and p < 0.01 (**) levels. TMD = Total Mood Disturbance.