Thirty-nine performednts performed a maximal voluntary contraction of the thigh, viewed red or a chromatic or achromatic control color, and then repeated the maximal voluntary contraction.
The operations required force application between 9.1 and 12.3% of maximal voluntary contraction between three operations.
Pain intensity and location, MMG and surface EMG from the biceps brachii were assessed during static isometric (0%, 10%, 30 %, 50 and, 70% of the mandmal voluntary contraction) and ramp isometric (0–50% of the maximal voluntary contraction) elbow flexions.
The right shoulder was elevating against a downward pressure force of 110% maximal voluntary contraction force exerted by the dynamometer.
Interventions: Questionnaire on physical activity and 2 sustained isometric voluntary contractions at 20% and 2 at 80% of the maximal voluntary contraction level.
Average electromyographic amplitudes obtained during the excercises were normalized to the amplitude in maximal voluntary contraction (% MVC) to produce interindividually comparable muscle activity assessments.
The normalization of EMG signals to those recorded during a maximal voluntary contraction provides a valid construct for comparisons of relative muscle activity.
In all conditions maximal voluntary contraction (MVC) significantly decreased after the TTE (P < 0.05) while motor-evoked potential area (MEP) increased after TTE (P < 0.05).
This study was designed to investigate whether H-reflex amplitude is affected by angular velocity during concentric and eccentric maximal voluntary contraction (MVC).
To overcome this problem, EMG data should be normalised using maximal voluntary contraction (MVC), but the best method for eliciting MVC in deep, thoracic paraspinal muscles is unknown.
Maximal voluntary contraction percentage.
