Electromyography
CONTRACTION
Biometrics Ltd Surface EMG (sEMG) sensors and systems (Biometrics Ltd, UK) were used to record muscle activity during voluntary isometric contraction in the last 5 min of the tDCS intervention. EMG electrodes were placed on the main ventricle of the muscle and oriented over the following muscles (right and left sides): deltoid, biceps, triceps, trapezius, and pectoralis muscles according to the standard muscle map provided by the EMG software. In this study, we placed the sensor halfway the most distal motor endplate zone and the distal tendon of the muscle