The present study examined the effect of wild blueberries on oxidative stress, the inflammatory response and DNA damage associated with exercise in untrained individuals. Ten sedentary males, aged 21-26 years, completed two single bouts of treadmill exercise at 70% of their VO2max. One bout occurred prior to, and one occurred following daily consumption of 300 g of wild blueberries for eight weeks. Blood samples were drawn during both exercise bouts and assayed for measures of oxidative stress (manganese-superoxide dismutase: Mn-SOD), inflammation (tumour necrosis factor-alpha: TNF-α and interleukin-6: IL-6) and DNA damage (comet assay). Blood samples were obtained immediately pre-exercise, and post exercise at 0, 30 and 60 min, and 3 and 6 h. A significant interaction between pre- and post-intervention over time was detected in plasma Mn-SOD concentration. Post hoc comparisons showed no significant differences between time points pre- and post-intervention, although plasma Mn-SOD concentration showed a moderate trend 30 min after exercise with wild blueberry consumption (P=0.072). A significant increase in IL-6 was observed for time (at 30 min and 1 h) following exercise, both pre- and post-intervention. No significant differences were seen in DNA damage or TNF-α either with exercise or the intervention. This study demonstrates that a single bout of exercise at 70% of VO2max is sufficient to cause a significant increase in inflammation in untrained individuals. The trend for Mn-SOD concentration to decrease after exercise post-intervention indicates a potential benefit of wild blueberries to increase antioxidant capacity and reduce oxidative stress.
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| All Time | Past 365 days | Past 30 Days | |
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The present study examined the effect of wild blueberries on oxidative stress, the inflammatory response and DNA damage associated with exercise in untrained individuals. Ten sedentary males, aged 21-26 years, completed two single bouts of treadmill exercise at 70% of their VO2max. One bout occurred prior to, and one occurred following daily consumption of 300 g of wild blueberries for eight weeks. Blood samples were drawn during both exercise bouts and assayed for measures of oxidative stress (manganese-superoxide dismutase: Mn-SOD), inflammation (tumour necrosis factor-alpha: TNF-α and interleukin-6: IL-6) and DNA damage (comet assay). Blood samples were obtained immediately pre-exercise, and post exercise at 0, 30 and 60 min, and 3 and 6 h. A significant interaction between pre- and post-intervention over time was detected in plasma Mn-SOD concentration. Post hoc comparisons showed no significant differences between time points pre- and post-intervention, although plasma Mn-SOD concentration showed a moderate trend 30 min after exercise with wild blueberry consumption (P=0.072). A significant increase in IL-6 was observed for time (at 30 min and 1 h) following exercise, both pre- and post-intervention. No significant differences were seen in DNA damage or TNF-α either with exercise or the intervention. This study demonstrates that a single bout of exercise at 70% of VO2max is sufficient to cause a significant increase in inflammation in untrained individuals. The trend for Mn-SOD concentration to decrease after exercise post-intervention indicates a potential benefit of wild blueberries to increase antioxidant capacity and reduce oxidative stress.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 173 | 110 | 20 |
| Full Text Views | 29 | 16 | 2 |
| PDF Views & Downloads | 18 | 7 | 1 |