摘要：Dinyer TK, Byrd MT, Vesotsky AN, Succi PJ, Bergstrom HC.Linear and Nonlinear Modeling of Critical Load. JEPonline 2020;23(5):1-13. The purpose of this study was to examine the estimatesof critical load (CL) and strength’ (S') for the deadlift from fourdifferent mathematical models (Linear-TW, Linear-Load, Nonlinear2, and Nonlinear-3). Eleven subjects completed one-repetitionmaximum (1RM) testing for the deadlift that was followed by thecompletion of repetitions to failure at four intensities (50%, 60%,70%, and 80% 1RM) on separate days. The load used, repetitionscompleted, and total work (load [kg] x repetitions) were recorded todetermine the CL and S' parameters from the four mathematicalmodels. All four models provided goodness of fit values ranging from0.457 to 0.995. The Linear-Load model provided the highestestimate of CL, while the Nonlinear-2 and Nonlinear-3 modelsprovided the lowest estimates. For S', the Nonlinear-2 andNonlinear-3 models provided the highest estimates, while the LinearLoad model provided the lowest. The four mathematical modelsindicated a moderate to strong relationship between total work andrepetitions completed for the deadlift. The CL may reflect the highestsustainable load that can be completed for an extended number ofrepetitions and may represent the point of compromised blood flow,while the S' parameter may reflect factors that modulate fatigue suchas muscle fiber type distribution patterns, motor unit activationstrategies, muscle ischemia, and the formation of cross-bridges.
关键词：Critical Power;Fatigue;Methodology;Resistance Training
