Electromyographic (EMG) assessment
bipolar Ag
ANTERIOR
The area of electrode placement was shaven to remove fine hair, rubbed with an abrasive skin gel to remove dead skin, and then cleaned with 70% isopropyl alcohol wipes. The sEMG was recorded from the Rectus Femoris (RF), Biceps Femoris (BF), Medial Gastrocnemius (GaM), and Tibialis Anterior (TA) muscles of the dominant leg using bipolar Ag–AgCl electrodes (SKINTACT, made German). The sEMG signals were amplified (× 1000), bandpass filtered (20 Hz–1 kHz), digitized online at 2 kHz, recorded (ME6000 device), and analyzed using MegaWin software (v.3.1). Variables from EMG: onset time, duration time of activity, maximum activity, signal amplitude, and time to peak. The analysis of the sEMG signal was done in such a way that at first the RMS of the raw signal was calculated and then it was normalized by using the averaging window 51 and the amplitude of the RMS signal using the formula (amplitude of each phase/resting amplitude signal).