Sensitivity analysis and publication bias
Sensitivity analysis indicated that any removal of the studies from the meta-analysis, create no change in the results of the meta-analysis on CK and LDH concentration. Funnel plots for CK and LDH were visually symmetrical (Figure 4) , and the Begg’s test results did not determine any publication bias evidence in articles that examine the effect of creatine supplementation on CK (Begg’s test, P = 0.176) and on LDH (Begg’s test, P = 0.185).