Effects of 12-Week Endurance Training at Natural Low Altitude on the Blood Redox Homeostasis of Professional Adolescent Athletes: A Quasi-Experimental Field Trial

Table 5

Resting levels of serum thiobarbituric acid reactive substances (TBARSs), xanthine oxidase (XO), total antioxidant capacity (T-AOC), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-PX), total glutathione (T-GSH), oxidized glutathione (GSSG), reduced glutathione (GSH), GSH/GSSG ratio, and uric acid (UA) of altitude (Alt) and sea-level (SL) runners before (pre) and after (post) the 12-week off-season conditioning program.

	Alt ()		SL ()
	Before	After	Before	After
TBARS (nmol⋅mL^−1)	4.81 ± 1.15	4.46 ± 1.22	2.62 ±	2.17 ±
XOD (U⋅L^−1)	20.8 ± 4.2	15.9 ±	18.2 ± 6.5	12.4 ±
T-AOC (U⋅mL^−1)	14.6 ± 3.2	14.5 ± 7.2	14.1 ± 2.8	12.4 ± 3.8
SOD (U⋅mL^−1)	55.6 ± 18.6	55.6 ± 13.6	77.7 ±	67.8 ± 21.6
CAT (U⋅mL^−1)	1.48 ± 0.50	2.16 ±	1.46 ± 0.60	1.63 ±
GSH-PX (U⋅mL^−1)	114.5 ± 24.1	88.1 ±	89.8 ±	73.1 ± 38.2
T-GSH (μmol⋅L^−1)	17.5 ± 1.1	18.5 ± 2.4	18.2 ± 1.3	17.1 ±
GSSG (μmol⋅L^−1)	5.31 ± 0.75	6.41 ±	5.96 ±	7.01 ± 0.87
GSH (μmol⋅L^−1)	6.88 ± 1.60	5.65 ±	6.31 ± 1.31	3.11 ±
GSH/GSSG	1.37 ± 0.62	0.89 ±	1.07 ± 0.26	0.47 ±
UA (mg⋅L^−1)	34.3 ± 9.0	38.1 ±	31.3 ± 5.5	28.1 ±

Values are mean ± SD.
Significantly different from corresponding preconditioning value, .
Significantly different from corresponding Alt value, .
Conditioning-induced change is significantly different from corresponding Alt value, .