Moderate Versus High Volume Light-Moderate Intensity Exercise for People With Moderate Parkinson's Disease

HV-PDAE classes will meet 5 times a week for 90 minute sessions for 3 weeks at onset of trial and then every 4 weeks for a year. All participants will receive 112.5h of training. PDAE was adapted for older adults with balance impairments; modifications were made to the frame and steps of Argentine tango. People with PD partner an individual without PD, e.g., staff, caregiver, friend, or university student. The instructor, staff lead and assistants monitor participants for safety. Class sizes will consist of 6 or fewer pairs of participants with PD and partners. Participants with PD will dance with new partners (individuals without PD) every 15-20 minutes. Participants will learn new steps in each class. The class format includes practicing steps, warm-up, partnering and rhythmic exercises, learning new steps, combining old and new steps, cool down. PDAE classes follow a syllabus with new steps, rhythms and embellishments included in each class.

MV-PDAE: MV classes will meet biweekly for 52 weeks for 65-minute sessions. All participants will receive 112.5h of training. . PDAE was adapted for older adults with balance impairments; modifications were made to the frame and steps of Argentine tango. People with PD partner an individual without PD, e.g., staff, caregiver, friend, or university student. The instructor, staff lead and assistants monitor participants for safety. Class sizes will consist of 6 or fewer pairs of participants with PD and partners. Participants with PD will dance with new partners (individuals without PD) every 15-20 minutes. Participants will learn new steps in each class. The class format includes practicing steps, warm-up, partnering and rhythmic exercises, learning new steps, combining old and new steps, cool down. PDAE classes follow a syllabus with new steps, rhythms and embellishments included in each class.

MV-WALK (65-minute sessions): WALK will control for the walking that participants in PDAE do and will also take place in groups to control social effects of intervention. Walking for