Table 3. The mean changes in plasma hormones.

Plasma Hormones		Mission Days
		−7 d	60 d	120 d	168 d	249 d	300 d	360 d	418 d	510 d	+7 d
Cortisol (mkg/dl)	Mean	18.39	13.19	17.18	17.16	18.81	14.36	21.29	15.13	23.75	15.84
	SD	4.35	2.65	4.08	3.53	5.39	4.97	5.59	7.96	3.91	6.59
5-HT (ng/ml)	Mean	239.03**	261.44	213.45	200.98	426.64	379.10	385.07	311.61	297.67	324.36
	SD	59.31	35.37	32.61	39.66	51.30	59.22	28.64	59.34	52.13	46.91
DA (ug/ml)	Mean	1.16	1.34	1.41	1.41	1.07	1.16	1.07	1.04	1.04	1.08
	SD	0.23	0.22	0.12	0.48	0.04	0.21	0.04	0.02	0.01	0.09
NE (pg/ml)	Mean	412.82**	458.58	528.32	505.76	781.61	873.31	745.29	650.16	624.31	623.11
	SD	83.22	82.77	113.21	97.21	100.43	153.59	73.91	107.49	118.98	34.49

Paired- t comparison between pre (−7 d) and post (+7 d) blood samplings,

* p <0.05,

** p <0.01.