Fig. 4From: Purple grape juice improves performance of recreational runners, but the effect is genotype dependent: a double blind, randomized, controlled trialEffects of whole purple grape juice on muscle damage (mean ± standard deviation). A and C creatine kinase; B and D lactate dehydrogenase. (δ) indicates a significant difference intra-group compared with moment immediately previous; (*) indicates intra-group difference at post-exercise compared with baseline. p < 0.05) analyzed by a two-way ANOVA for repeated measurements (n = 47)Back to article page