Question

What does it mean when there is no signifcant difference between the EMG signal amplitude of muscle fatigue?

Answer 1

Ans-

Electromyography (EMG) is the electric potential differences in muscles as a result of motor unit action potentials can be measured with electromyography and reported as EMG amplitudes.

or in other words-

The presence of electric potential differences in muscles is the result of motor unit action potentials produced by the central nervous system (CNS) which can be measured using electromyography. And reported as an EMG amplitude.

Muscle Fatigue occurs when the muscle experiences a reduction in its ability to produce force and accomplish the desired movement.

Different amplitudes of the signal are due to randomly varying both the joint moment and the overall amplification factor of the EMG apparatus.

When there is no difference between means

'Fatigue is reflected in the EMG signal as an increase of its amplitude and a decrease of its characteristic spectral frequencies