Surface EMG is a reliable, non-invasive tool used for measuring muscular electrical activity. Electromyography (EMG) can provide unique information about the mechanical and motor control strategies during various types of muscle actions. EMG measures muscle activation, with surface EMG reflecting the algebraic sum of electric muscle action potentials that pass within the recording areas of the EMG electrodes. There, EMG amplitude quantifies muscle activation, which can be altered by the number of motor units recruited and the firing rates of the activated motor units. Thus, decreases in EMG amplitude due to decreases in muscle activation (Marek, et al). The surface EMG protocol will be performed completely by a third investigator.