Recovery effect of postural control by electrical stimulation acupoint massage after local muscle fatigue / 医用生物力学

ABSTRACT

Objective To evaluate the recovery effect of postural control by electrical stimulation acupoint massage after local muscle fatigue by investigating joint torque, surface electromyography (EMG) signal, balance ability and foot pressure distributions. Methods Six subjects (12 person-times) accepted isokinetic, SEMG and foot pressure test under the condition of normal rest or electrical stimulation acupoint massage after ankle fatigue. Results After electrical stimulation acupoint massage, ①the forward and backward displacement of COF (center of force) was significantly reduced and the contact area of T1, T2 and T4,5 was increased to (11.64±2.12), (6.57±0.97), (3.72±1.33) cm2, respectively. ② In ankle isokinetic test (90°/s), the total work of ankle plantar flexion and dorsiflexion was significantly increased to (56.71±13.26) and (19.75±3.79) J. ③ In right leg stance, RMS (root mean square) of the tibialis anterior and lateral gastrocnemius was decreased significantly; the ankle isokinetic test (90°/s) showed that the RMS of the medial and lateral gastrocnemius was increased from (48.95±13.50) and (33.67±6.41) μV to (59.87±11.46) and (43.73±4.65) μV, respectively. Conclusions Electrical stimulation acupoint massage can optimize the force strategy and improve the stability of the ankle, further improve the postural control ability, promote the recovery of sports ability and avoid sports injuries.