Development of Hybrid Transducer for Simultaneous measurement of Mechanomyogram and Electromyogram during Muscle Contraction

在这项研究中，为了同时测量肌肉收缩的输入信号肌电(EMG)和收缩产生的输出振动机械肌电(MMG)，研制了一种混合式肌肉收缩换能器，它是一种使用带有两个EMG电极的光反射器的位移-MMG换能器。它包括一个无线传输模块，不会因为身体运动或人工制品而产生错误。对由MMG/EMG比值得到的肌肉收缩评价指标进行了检验，并将其应用于下蹲运动和功率性运动中的MMG和EMG同时测量等。

In this study, to measure an electromyogram(EMG) which is an input signal to muscles that will contract, and a mechanomyogram (MMG) which is a resulting output vibration from contraction simultaneously, the hybrid transducer of muscle contraction was developed, which was a displacement-MMG transducer using a photo-reflector with two EMG electrodes. It included a wireless transmission module and was free from the errors resulting from body movements or artifacts. The evaluation index of muscle contraction obtained from MMG/EMG ratio was examined applying it to the simultaneous measurement of MMG and EMG during a squat movement and an ergometer exercise etc.