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Creatine kinase levels (CK) in the baseline situation (basal), placebo group and glutamine supplemented group. (*) Significant values (p < 0.05) comparing glutamine vs. basal. (#) Significant values (p < 0.05) comparing glutamine vs. placebo. The clear similarity between baseline levels and placebo indicates that there was no placebo effect (a t-test showed no significant differences between these two groups, p = 0.9).
