Table 2.
Changes in blood oxidative stress markers over 3 consecutive days of exercise in males
| Day 1 | Day 2 | Day 3 | Day 4 | Two-way analysis of variance | |||
|---|---|---|---|---|---|---|---|
| Interaction | Water | Day | |||||
| Diacron-reactive oxygen metabolites (Carratelli unit) | |||||||
| PW | 266.5±8.9 | 268.1±9.8 | 260.6±6.8 | 273.1±9.5 | n.s. | P = 0.09 | P < 0.05 |
| HW | 297.6±17.2 | 303.4±13.8 | 283.8±18.5 | 303.5±14.3 | |||
| Biological antioxidant potential (μM) | |||||||
| PW | 2272.5±75.3 | 2291.9±80.5 | 2319.6±50.5 | 2136.0±57.2 | P = 0.07 | n.s. | n.s. |
| HW | 2149.6±64.0 | 2184.5±54.4 | 2163.6±45.7 | 2233.5±65.0 | |||
| Biological antioxidant potential/ diacron-reactive oxygen metabolites (arbitrary unit) | |||||||
| PW | 8.6±0.4 | 8.6±0.2 | 8.9±0.2 | 7.9±0.2# | P < 0.05 | – | – |
| HW | 7.3±0.3† | 7.3±0.3† | 7.8±0.4† | 7.5±0.4 | |||
Note: Values are expressed as mean ± standard error. †P < 0.05, vs. PW; #adjusted P < 0.05, vs. Day 3. For diacron-reactive oxygen metabolites, a significant main effect of day was found; post-hoc analysis revealed that the diacron-reactive oxygen metabolite values at Day 4 were significantly higher than those at Day 3 (adjusted P < 0.05). PW: Placebo water; HW: molecular hydrogen-rich water; n.s.: not significant.