Fig 4. The visualized results of EMG-sensor feedback in the mobile applications for patients with stroke.

(A) The type, posture, dose, and instructions of prescribed exercises; (B) a message for participants to contract the target muscles; (C) ongoing exercise performances, including repetitions per set, sessions per day, and sets per session; (D) the bar graph representing the percentage of the peak EMG signals relative to their target amplitude during muscle contractions; (E) buttons for pause and termination of prescribed exercises.