A Single Dose Of Purple Grape Juice Improves Physical Performance And Antioxidant Activity In Runners: A Randomized, Crossover, Double-blind, Placebo Study

Effect Increase
Values 43.6% increase in TAC (p = 0.000) at the post-exercise timepoint compared to the level at baseline.
Trial Design Randomized trial
Trial Length 24 hours
Number of Subjects 14
Sex Male
Notes for this study:
"The participants ran for an average of 59.2 ± 27.8 min until exhaustion in the placebo group and for 68.4 ± 29.7 min until exhaustion in the grape juice intake group, which was a significantly longer time (p = 0.008). This improvement in physical performance was accompanied by a 43.6% increase in TAC (p = 0.000) at the post-exercise timepoint compared to the level at baseline. MDA, A1GPA, hs-CRP, CK, and LDH did not exhibit changes. In contrast, no significant change in any variable was observed after consuming the placebo drink.

CONCLUSION:
The single-dose intake of purple grape juice demonstrated an ergogenic effect in recreational runners by increasing run time to exhaustion and increasing antioxidant activity."

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