Inclusion Criteria:  Confirmed diagnosis of RRMS with Expanded Disability Status Scale (EDSS) score between 1.5 and 6.5, 18-75 years of age, Deemed minimal risk for cardiovascular event using American College of Sports Medicine Exercise Pre-participation Criteria  Exclusion Criteria:  hospitalization for myocardial infarction, heart failure or heart surgery within 3 months, serious cardiac arrhythmia, hypertrophic cardiomyopathy, severe aortic stenosis, pulmonary embolus, significant contractures, dysphagia resulting in inability to sufficiently hydrate, and other contraindication to exercise.