Decrease in maximal voluntary contraction by tonic vibration applied to a single synergist muscle in humans.

@article{Kouzaki2000DecreaseIM,
  title={Decrease in maximal voluntary contraction by tonic vibration applied to a single synergist muscle in humans.},
  author={M. Kouzaki and M. Shinohara and T. Fukunaga},
  journal={Journal of applied physiology},
  year={2000},
  volume={89 4},
  pages={
          1420-4
        }
}
The purpose of the study was to examine the effect of prolonged tonic vibration applied to a single synergist muscle on maximal voluntary contraction (MVC) and maximal rate of force development (dF/dt(max)). The knee extension MVC force and surface electromyogram (EMG) from the rectus femoris (RF), vastus lateralis (VL), and vastus medialis (VM) during MVC were recorded before and after vibration of RF muscle at 30 Hz for 30 min. MVC, dF/dt(max), and the integrated EMG (iEMG) of RF decreased… Expand
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It is suggested that modulations in knee extension force fluctuations are caused by the unique muscle activity in RF during the alternate muscle activity, which augments the high-frequency component of the fluctuations. Expand
Effects of prolonged vibration to vastus intermedius muscle on force steadiness of knee extensor muscles during isometric force-matching task.
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Inhibitory Effects of Prolonged Vibratory Stimulus on the Maximal Voluntary Contraction Force and Muscle Activity of the Triceps Brachii: An Experimental Study.
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An Acute Exposure to Muscle Vibration Decreases Knee Extensors Force Production and Modulates Associated Central Nervous System Excitability
TLDR
Results confirm the hypothesis that modulations within the central nervous system would accompany the significant reduction of maximal voluntary force and explain the decreased MVC after prolonged LV, as suggested by reductions in maximal EMG and TMEP area. Expand
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TLDR
The findings suggest that Ia-afferent input may not substantially contribute to maximal voluntary dynamic muscle strength of the plantar flexor muscles, as tested here, and thus, the results do not support the notion that Ianafferent excitation would contribute differently to neural activation in maximal voluntary lengthening and shortening muscle actions. Expand
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