Inclusion Criteria:  Diagnosis of idiopathic PD from movement disorders neurologist with the United Kingdom Brain Bank criteria of bradykinesia with 3 or more of the following - rest tremor, rigidity, bradykinesia and balance problems not from visual, vestibular, cerebellar or proprioceptive conditions excellent response to levodopa Hoehn & Yahr 24 stages II-IV ages 55-85 years old  Exclusion Criteria:  Major musculoskeletal or neurological disorders, structural brain disease, epilepsy, acute illness or health history, other than PD no medical condition that precludes exercise MoCA ≤ 21 or inability to follow directions excessive use of alcohol or recreational drugs recent change in medication inability to stand and walk for 2 minutes without an assistive device