Non-Invasive Vagus Nerve Stimulation will be provided to the participants using a transcutaneous electrical nerve stimulation (TENS) unit, a routine physical therapy intervention by the faculty researcher who is a licensed physical therapist. The electrodes will be clipped to ear over the vagus nerve distribution area. The parameters will be 30 Hz, 250 us, 5 minutes, at tolerance (no pain). Reaction time will test collected pre and post the stimulation using online reaction time testing platform.