The aim of this study was to evaluate the pattern of electrophysiological fatigue in isometric contractions interrupted by different periods of rest. Thirteen volunteer healthy subjects were examined after informed consent. From the mechanical point of view, the periods of rest enabled the subjects to maintain the isometric contractions for longer periods of time and with higher counterloads than if the isometric contraction was continuous. In all the variations of counterload and periods of rest, the electrical parameters behaved similarly to the pattern of fatigue observed in continuous isometric contractions; the frequency gradually decreased, while the duration, maximal amplitude and total voltage area increased. It may be concluded that regardless of the manner in which the isometric contraction is carried out, the ensuing electrophysiological fatigue will be similar, and that the periods of rest do not affect the behavior of any of the electrical parameters.
|Number of pages||6|
|Journal||Electromyography and Clinical Neurophysiology|
|State||Published - 1986|