Question: is this simply a result of the anti-oxidents that are in blueberries?
Or is there something else in play here?
Considering the above I am leaning towards the idea that there is something else in the blueberries besides the antioxident content which is whats responsible for the increased recovery?Eur J Appl Physiol. 2010 Nov 11.
Oxidative stress, inflammation and recovery of muscle function after damaging exercise: effect of 6-week mixed antioxidant supplementation.
There is no consensus regarding the effects of mixed antioxidant vitamin C and/or vitamin E supplementation on oxidative stress responses to exercise and restoration of muscle function. Thirty-eight men were randomly assigned to receive either placebo group (n = 18) or mixed antioxidant (primarily vitamin C & E) supplements (n = 20) in a double-blind manner. After 6 weeks, participants performed 90 min of intermittent shuttle-running. Peak isometric torque of the knee flexors/extensors and range of motion at this joint were determined before and after exercise, with recovery of these variables tracked for up to 168 h post-exercise. Antioxidant supplementation elevated pre-exercise plasma vitamin C (93 ± 8 ?mol l(-1)) and vitamin E (11 ± 3 ?mol l(-1)) concentrations relative to baseline (P < 0.001) and the placebo group (P <= 0.02). Exercise reduced peak isometric torque (i.e. 9-19% relative to baseline; P <= 0.001), which persisted for the first 48 h of recovery with no difference between treatment groups. In contrast, changes in the urine concentration of F(2)-isoprostanes responded differently to each treatment (P = 0.04), with a tendency for higher concentrations after 48 h of recovery in the supplemented group (6.2 ± 6.1 vs. 3.7 ± 3.4 ng ml(-1)). Vitamin C & E supplementation also affected serum cortisol concentrations, with an attenuated increase from baseline to the peak values reached after 1 h of recovery compared with the placebo group (P = 0.02) and serum interleukin-6 concentrations were higher after 1 h of recovery in the antioxidant group (11.3 ± 3.4 pg ml(-1)) than the placebo group (6.2 ± 3.8 pg ml(-1); P = 0.05). Combined vitamin C & E supplementation neither reduced markers of oxidative stress or inflammation nor did it facilitate recovery of muscle function after exercise-induced muscle damage.
But then again antioxidant-rich foods such as blueberries also contain other compounds such as polyphenols, anthocyanins, ellagitannins, and sterols and these work to enhance the body's internal antioxidant system to better eliminate oxidative stress markers like creatine kinase and interleukin-6. Im not entirely sure how accurate this is though but it would explain why the same isnt seen in when you supplement with antioxidents like vitamin E, A and C like in the above study