TENS plus therapeutic exercise group (TENS group) Two-channel TENS (TENS-7000, Koalaty Products Inc., USA)was used. TENS electrodes (5 cm2) were placed on the affected lower extremity on the lateral and medial quadriceps and gastrocnemius. A frequency of 100 Hz and a pulse width
200 μs were used. Participant pre-stimulation threshold was measured from 0.01 mA and stimulated by 90% amplitude using the sub-sensory threshold [4]. Stimulation was 30 min,and the patient perceived no sensation. TENS was used with the general exercise program.