Voluntary drive-dependent changes in vastus lateralis motor unit firing rates during a sustained isometric contraction at 50% of maximum knee extension force

@article{Ruiter2003VoluntaryDC,
  title={Voluntary drive-dependent changes in vastus lateralis motor unit firing rates during a sustained isometric contraction at 50% of maximum knee extension force},
  author={C. J. de Ruiter and Michael J. Elzinga and Peter W L Verdijk and Willem van Mechelen and Arnold de Haan},
  journal={Pfl{\"u}gers Archiv},
  year={2003},
  volume={447},
  pages={436-444}
}
The purpose of the present study was to relate the expected inter-subject variability in voluntary drive of the knee extensor muscles during a sustained isometric contraction to the changes in firing rates of single motor units. Voluntary activation, as established with superimposed electrical stimulation was high (range: 91–99%, n=8) during a short maximal contraction, but was lower (range: 69–100%) in most subjects at the point of force failure during a sustained (49.1±10.1 s) fatiguing… CONTINUE READING
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