Supplementary Table S27. CINeMA confidence evidence profile for the One-Repetition Maximum (1RM) strength. Comparison Number of studies Within-study bias Reporting bias Indirectness Imprecision Heterogeneity Incoherence Confidence rating Flexibility Training:Regular Training 2 No concerns Some concerns No concerns Major concerns No concerns No concerns Low Flexibility Training:Speed Training 1 Some concerns Some concerns No concerns Major concerns No concerns No concerns Very Low Flexibility Training:Traditional Strength Training 2 No concerns Some concerns No concerns No concerns Major concerns No concerns Low Regular Training:Speed Training 2 No concerns Some concerns No concerns Major concerns No concerns No concerns Very Low Regular Training:Traditional Strength Training 7 No concerns Some concerns No concerns No concerns Major concerns No concerns Very Low Speed Training:Traditional Strength Training 2 No concerns Some concerns No concerns No concerns Major concerns No concerns Very Low