Non-Invasive Neurostimulation of the Vagus Nerve With the AlphaCore Device for the Relief of EIB

Inclusion Criteria: 1. Is able to give written Informed Consent. 2. Is between the ages of 18 and 60 years, male or female. 3. Has a history of breathlessness during and after exertion. 4. Normally controls or prevents EIB using a short acting beta-agonist (SABA). 5. Is willing to take a urine pregnancy test if female of childbearing potential and agrees not to become pregnant for the duration of the study. Exclusion Criteria: 1. Has any condition that would prevent or otherwise inhibit reasonable exertion required to induce bronchoconstriction. 2. Is unable to perform acceptable-quality spirometry (FEV1 \< 75% predicted). 3. Is currently using Beta2-adrenergic blockers (i.e. propranolol). 4. Has smoked within the past year, and/or more than 10 pack year history. 5. Has a history of lung cancer, chronic obstructive pulmonary disease (COPD), or other co-morbidity associated with irreversible narrowing of the airways. 6. Has an abscess or other infection or lesion (including lymphadenopathy) at the AlphaCore treatment site. 7. Has known or suspected moderate to severe atherosclerotic cardiovascular disease, carotid artery disease (e.g. bruits or history of TIA or CVA). 8. Has a clinically significant irregular heart rate or rhythm. 9. Has uncontrolled hypertension (systolic bp \> 200 or diastolic bp \>100), recent (within the last 3 months) heart attack, recent (within the last 3 months) stroke, known aortic aneurysm, or congestive heart failure (CHF). 10. Is currently implanted with an electrical and/or neurostimulator device, including but not limited to cardiac pacemaker, defibrillator, vagal neurostimulator, deep brain stimulator, spinal stimulator, bone growth stimulator, or cochlear implant. 11. Has a history of carotid endarterectomy, vagotomy (right or bilateral), dysaesthesia or vascular neck surgery on the right side. 12. Has been implanted with metal cervical spine hardware. 13. Has a recent or repeated history of syncope. 14. Has a recent or repeated history of seizures. 15. Has a condition that would interfere with VAS Dyspnea self-assessment. 16. Is pregnant or nursing, or of childbearing potential and is unwilling to use an accepted form of birth control. 17. Is participating in any other therapeutic clinical investigation or has participated in a clinical trial in the preceding 30 days. 18. Belongs to a vulnerable population or has any condition such that his or her ability to provide informed consent, comply with follow-up requirements, or provide self-assessments is compromised (e.g., homeless, developmentally disabled, prisoner). 19. Is an employee or relative of the Investigator or the clinical study site.