Motor evoked potential amplitude (A) and silent period duration during the force-matching and position-matching tasks (B).

<p>A. The motor evoked potential (MEP) amplitude (%pre-fatigue baseline) increased during both fatigue-tasks in the biceps (*<i>p</i> = 0.03) and the brachioradialis (**<i>p</i> = 0.01). B. Silent period (SP) duration (%pre-fatigue baseline) increased throughout both fatigue tasks in the biceps (*<i>p</i><0.01) and the brachioradialis (**<i>p</i><0.01).