Muscle fibre conduction velocity during fatiguing and nonfatiguing isometric arm contractions.

In the present study the behaviour of muscle fibre conduction velocity was investigated by means of a new method for the continuous registration from surface EMGs. During fatiguing isometric arm contractions at 40% of maximum voluntary contraction close relations between conduction velocity and spectral parameters of surface EMG were found. In short nonfatiguing contractions at 15%, 30%, 45%, 60%, and 75% of maximum force no significant differences of conduction velocity could be observed. An example of continuous registration of the parameters is given.