Estimation model of muscle fatigue based on muscle fiber type using electromyography

Abstract

In muscle rehabilitation and training, it is important to evaluate a patient's muscle state. In general, training is based on physical therapy, but there has not been quantitative assessment of the actual effects on muscles. The authors previously tried to quantify muscle fatigue and defined “Muscle‐fatigue time (MFT)” as the quantitative evaluation index of muscle fatigue based on electromyography and the use ratio of the muscle fiber type. MFT is the time when the use ratio of the slow muscle fiber (Type I) and the fast muscle fiber (Type IIb) intersects. Furthermore, the authors also proposed a method to estimate MFT by modeling the relationship between each muscle load and MFT. This paper examines the appropriate evaluation method for MFT containing variation, and generalization performance of the constructed model.

A Surface Electromyography (sEMG) System Applied for Grip Force Monitoring

“…It has been demonstrated that grip force can be employed as a reliable indicator of muscle weakness in the upper limbs during the chronic post-stroke period [ 23 ]. Additionally, sEMG can accurately reflect local muscle fatigue in the human body [ 24 ] and is an effective way of tracking and evaluating muscle coordination [ 25 ], predicting forearm movements [ 26 ] and joint angle [ 27 ].…”