Inclusion criteria:  Individuals with Parkinson's Disease Age >18 H&Y stage 1-3 in the medication on and stimulation on state History of STN DBS Able to tolerate exercise from a cardiovascular, cognitive, and orthopedic perspective Not on beta-blockers, as we will be using heart rate-based targets Stable medication and stimulation for 60 days prior to baseline visit Access to exercise equipment  Exclusion criteria:  Medical comorbidities that preclude safe exercise per the discretion of the principal investigator Regular exercisers