Muscle Function and Thickness Are Not Associated with Responsiveness to Post-Activation Performance Enhancement

There is great variability in responsiveness to post-activation performance enhancement (PAPE). Factors such as greater expression of type II muscle fibers and experience with strength training are associated PAPE. We investigated whether there an association between markers muscular function morphology PAPE untrained individuals. Sixty-six active men (22 ± 2 years, 74 11 kg, 172 27 cm) participated the study. Their countermovement jump (CMJ) heights were measured before four minutes after a pre-activation protocol consisting five squats 5RM load. Isometric knee extensor peak torque (IPT), CMJ power (POCON), thickness vastus lateralis (VLMT) participants also determined unpotentiated condition. Change height (ΔCMJ) following was calculated its associations baseline (CMJCON), POCON, IPT, VLMT tested. Linear stepwise multiple regression models applied screen for predictors ΔCMJ among dependent variables. No significant change (p = 0.28) observed PA (pre: 30.8 5.1 cm; post: 31.0 5.5 cm). > 0.05) found VLMT, CMJCON (r 0.29, 0.18, 0.09, 0.01, respectively). analyses did not result any prediction. Although we confirmed high individual response PA, no neuromuscular performance/morphology found.