Stepwise multiple linear regression analysis with muscle power changes as a dependent variable and the individual values of the different sEMG parameters obtained during the fatiguing dynamic protocol as independent variables showed that the average log FInsm5 (averaged for VM and VL muscles) as a single parameter predictor accounted for 37% of the performance variance of changes in muscle power, and the log FInsm5 and MFM, as a two factor combination predictor, accounted for 44% of the performance variance of changes in muscle power.