Abstract: Objective To provide a new method for recognizing isotonic or isometric exercise in the rehabilitation of lower residual limbs for the patients after amputation. Methods The signs of surface electromyography (sEMG) of leg quadriceps of 10 amputees in rehabilitation were collected with EMG Sensor and analyzed. Results The absolute magnitude average (MAV)，variance (VAR) and power spectrum coefficient of sEMG can be used as the character value to establish the relation of the sEMG sign and lower limbs motor of rehabilitation. Conclusion A method recognizing the pattern of lower limbs motor in rehabilitation has been advanced, which may be used in further study for the systems controlling lower limbs in rehabilitation of residual limb.

Key words: amputation, lower limbs, rehabilitation, surface electromyography, features extraction