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Objective We investigated whether the inflammatory response and delayed onset of muscle soreness after a marathon are altered by resveratrol, a natural polyphenolic flavonoid antioxidant. Design: Double blind placebo-controlled randomised pilot study. Setting: London Marathon. Participants: Marathon race participants Interventions: 7 healthy male athletes were randomised to receive Resveratrol (600 mg Resveratrol daily for 7 days immediately before the marathon) or a placebo. Main Outcome Measurements: Blood samples taken 48 hours before and 18–32 hours after the marathon were analysed for white blood cell count (WBC) and C-reactive protein (CRP). A VAS score was taken at the same times as the blood samples to assess delayed onset muscle soreness. Results: There were no significant differences between the two groups in terms of changes occurring between pre- and post- tests for WBC, CRP or VAS. Conclusions: There were no differences in immune response or delayed onset muscle soreness between resveratrol and placebo after a marathon. Further investigations are needed with longer treatment time and higher doses, analysing additional parameters such interleukins for a possible effect of resveratrol on the inflammatory response due to extensive exercise. To avoid a type II error, 17 subjects in each group would be required.

Resveratrol exerts no effect on inflammatory response and delayed onset muscle soreness after a marathon in male athletes.