Table 2.
Oxidative stress indicators and the concentration of urea, cortisol, and testosterone in the blood serum of kayakers from the Polish National Team during a 19-day physical activity including WBC sessions twice a day for the first 10 days.
| Baseline (Day 0) | Day 5 | Day 11 | Day 19 | |
|---|---|---|---|---|
| MDA [10−2 nmol/mL] | 26.3 ± 2.5 | 27.7 ± 2.4 | 26.0 ± 1.8 | 25.5 ± 1.8 |
| CD [10−1 Abs./mL] | 4.6 ± 2.5 | 4.6 ± 1.2 | 4.4 ± 1.0 | 3.6 ± 0.8 |
| TBARS [10−2 nmol MDA/mL] | 50.3 ± 5.0 | 51.2 ± 7.0 | 45.9 ± 5.3 | 42.3 ± 4.4aabb |
| Protein carbonyls [µmol/mg] | 538.4 ± 23.3 | 534.8 ± 136.1 | 535.4 ± 36.2 | 535.8 ± 25.5 |
| Vit. E [μg/L] | 17.7 ± 8.2 | 14.6 ± 3.7 | 13.6 ± 3.3 | 13.1 ± 2.9 |
| GPx [U/L] | 225.9 ± 26.4 | 191.6 ± 27.8a | 212.9 ± 42.6 | 229.4 ± 30.3b |
| TAC [µM CRE] | 813.6 ± 67.7 | 769.6 ± 78.4 | 774.1 ± 102.0 | 845.3 ± 114.0 |
| Urea [mg/dL] | 33.1 ± 6.3 | 39.9 ± 6.3a | 45.2 ± 5.5aa | 37.2 ± 8.4c |
| Cortisol [nmol/L] | 628.2 ± 62.9 | 661.3 ± 83.1 | 688.7 ± 73.4 | 638.4 ± 109.2 |
| Testosterone [nmol/L] | 23.8 ± 5.9 | 22.8 ± 4.9 | 24.4 ± 4.7 | 24.9 ± 5.6 |
The results are expressed as the mean ± standard deviation; astatistically significant difference versus baseline (a P < 0.05, aa P < 0.01), bstatistically significant versus Day 5th (b P < 0.05, bb P < 0.01), and cstatistically significant versus Day 11 (P < 0.05).