Wearable iFEMG Sensor for Muscle Strength Evaluation

To achieve portable, low-cost, long-term, and precise muscle activities monitoring for applications such as clinical rehabilitation and athletic training, we built a wearable sensing system that integrated high-sensitivity iontronic-FMG sensor and sEMG electrodes, which allowed us to gain a deeper insight into the bioelectrical activity and mechanical behavior of muscles. In order to verify the effectiveness of the system and explore the physiological mechanism of the FMG & sEMG fusion, we conducted a muscle strength test by using an ultrasound image as a clinical standard. The results revealed the correlation between FMG signal amplitude and muscle mechanical characteristics. Furthermore, muscle strength could be predicted accurately.