Pain perception and creatine kinase
pain
No significant group × time interaction was revealed for subjective pain perception (As the assumption of homogeneity of variance and normality of distribution were violated for CK values, Friedman test was used as a non-parametric alternative for repeated measures ANOVA. Accordingly, median, and interquartile range instead of mean values were considered for CK concentration. CK concentration increased significantly in the ECC group (