Table 2.

Mean (±SD) of the redox status in plasma and erythrocytes of aminothiols in ultramarathon athletes before (pre) and immediately after (post) 50 and 100 km race. Concentrations of various forms are expressed in μmol·L⁻¹. Significant differences compared to prerace: P < 0.05 (∗ symbol), P < 0.01 (# symbol), and P < 0.0001 (¶ symbol).

	50 km				100 km
	Pre	Post	P		Pre	Post	P
Plasma
Cysteine
Total	266.95 ± 25.06	298.85 ± 27.00	ns		247.15 ± 26.92	396.58 ± 40.02	¶
Reduced	10.05 ± 2.08	12.93 ± 0.79	ns		10.76 ± 2.89	15.33 ± 2.66	¶
Oxidized	256.90 ± 24.58	285.93 ± 26.62	ns		234.52 ± 25.94	381.25 ± 38.97	¶
Homocysteine
Total	6.03 ± 1.34	7.04 ± 1.85	ns		6.41 ± 1.58	9.47 ± 1.81	¶
Reduced	0.05 ± 0.03	0.05 ± 0.02	ns		0.08 ± 0.03	0.06 ± 0.03	ns
Cysteinylglycine
Total	24.75 ± 2.61	29.96 ± 3.67	ns		24.25 ± 3.49	38.21 ± 3.54	¶
Reduced	2.00 ± 0.65	2.11 ± 0.52	ns		2.35 ± 0.40	1.92 ± 0.45	∗
Oxidized	22.76 ± 2.52	27.85 ± 3.25	ns		22.03 ± 3.57	36.29 ± 3.65	¶
Glutathione
Total	7.12 ± 1.47	9.66 ± 1.45	ns		7.20 ± 1.12	17.63 ± 2.23	¶
Reduced	0.41 ± 0.08	0.41 ± 0.08	ns		0.44 ± 0.08	0.44 ± 0.10	ns
Oxidized	6.71 ± 1.44	9.25 ± 1.50	ns		6.76 ± 1.24	17.19 ± 1.84	¶
Erythrocyte
Cysteine
Total	78.46 ± 7.99	87.01 ± 7.62	ns		78.84 ± 10.43	84.53 ± 11.69	ns
Reduced	12.42 ± 1.69	12.44 ± 1.69	ns		12.02 ± 2.37	11.80 ± 2.71	ns
Oxidized	66.04 ± 7.77	74.57 ± 7.25	ns		67.49 ± 8.59	72.73 ± 11.69	ns
Homocysteine
Total	2.35 ± 0.51	2.39 ± 0.33	ns		2.36 ± 0.47	2.44 ± 0.32	ns
Reduced	0.90 ± 0.13	0.84 ± 0.22	ns		0.89 ± 0.18	0.86 ± 0.26	ns
Oxidized	1.45 ± 0.43	1.55 ± 0.36	ns		1.47 ± 0.42	1.58 ± 0.23	ns
Cysteinylglycine
Total	2.15 ± 0.35	2.23 ± 0.31	ns		2.26 ± 0.34	2.21 ± 0.29	ns
Reduced	0.35 ± 0.07	0.44 ± 0.23	ns		0.33 ± 0.12	0.32 ± 0.10	ns
Oxidized	1.80 ± 0.30	1.78 ± 0.34	ns		1.94 ± 0.28	1.90 ± 0.29	ns
Glutathione
Total	1666.88 ± 90.44	1704.13 ± 113.41	ns		1667.08 ± 132.21	1692.80 ± 131.13	ns
Reduced	1482.12 ± 82.21	1450.11 ± 62.13	ns		1489.33 ± 132.16	1401.32 ± 122.26	ns
Oxidized	184.77 ± 91.10	254.01 ± 95.65	ns		178.70 ± 54.57	291.48 ± 76.41	#