Evaluation of muscular load of m. biceps brachii in isometric contraction with the use of microvibration.

概要

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The influence of load by maintaining isometric muscular contraction till exhaustion to microvibration (MV) on m. biceps brachii was studied with the use of MV sensor (MT-3T, acceleration type). The amplitude of MV was calculated with both band pass filter and integrator, while the frequency of MV was analyzed by Fourier transform and the power spectrum was obtained. It was found to be reasonable that the effective load to the muscle was evaluated not by the force but by the momentum which was the product of the force and endurance time till exhaustion.The momentum which corresponded to holding the force less than 25 %MVC (maximum voluntary contraction) till exhaustion increases the amplitude by about 40%, as compared with that at rest state. The augmentation of the momentum also increases the change of the peak frequency. The results indicated that MV as well as electromyogram could be applied to the evaluation of muscular fatigue in isometric contraction.
日本生理人類学会の論文