A new EMG frequency-based fatigue threshold test.

摘要: Abstract Theoretically, the critical torque (CT) and electromyographic mean power frequency fatigue threshold (EMG MPFFT) describe maximal non-fatiguing isometric level. Purpose The purposes of this study were two-fold: (1) to determine if mathematical model for estimating EMG (EMGFT) from amplitude signal was applicable domain estimate a new called MPFFT; (2) compare level derived CT test that MPFFT vastus lateralis (VL) muscle during actions leg extensors. Methods Nine adults (4 men 5 women; mean ± SD age = 21.6 ± 1.2 yr) performed three or four continuous, fatiguing, extensors at 30, 45, 60, 75% maximum voluntary contraction (MVIC) time exhaustion (Tlim) values. slope coefficient linear relationship between total “work” (Wlim in N m s = Torque × Tlim) Tlim defined as CT. Surface signals recorded each fatiguing action. y-intercept versus MPF time) plot. Results There no significant differences (19.7 ± 5.8%MVIC) (21.4 ± 8.7%MVIC). Conclusion These findings provided indirect validation test.