Inclusion Criteria:  Neurologist confirmed clinical diagnosis for Parkinson's disease Hoehn & Yahr stage I-III Ambulatory for indoor and outdoor mobility without assistance or assistive device Successful completion of Physical Activity Readiness Questionnaire (PAR-Q)26 or medical clearance from GP  Exclusion Criteria:  Musculoskeletal injury that would prevent participation in an exercise program Other neurological disease or disorder such as stroke