Treatment Concepts for the Motor and Nonmotor Symptoms in ParkinsonEffects of Lightweight Wearable Ankle Exoskeleton in an Individual With Parkinson Disease A Case ReportJain, Tarang K. PhD, PT; Carter, Valerie PT, NCS, GCS; Lerner, Zachary F. PhDAuthor Information Departments of Physical Therapy and Athletic Training (Dr Jain and Ms Carter) and Mechanical Engineering (Dr Lerner), Northern Arizona University, Flagstaff. Correspondence: Tarang K. Jain, PhD, PT, Department of Physical Therapy and Athletic Training, Northern Arizona University, PO Box 15105, Flagstaff, AZ 86005 (Tarang.Jain@nau.edu). Zachary Lerner is a named inventor on a patent application describing the device and cofounder of a company that is seeking to commercialize the technology. Other authors declare no conflict of interest. Topics in Geriatric Rehabilitation: July/September 2020 - Volume 36 - Issue 3 - p 146-151 doi: 10.1097/TGR.0000000000000273 Buy Metrics Abstract Background: This is a feasibility study aimed to investigate the effects of a novel lightweight ankle exoskeleton on gait and balance in an individual with Parkinson disease (PD). Case Description: An 85-year old woman with a 5-year history of PD (Hoehn and Yahr stage 2.5) participated in the study. The participant received 4 visits over 4 weeks including 1 evaluation and three 30-minute training sessions wearing the ankle exoskeleton. Results: The participant demonstrated a 26% reduction in metabolic cost during walking and nearly 10% improvement in peak anterior-posterior center-of-pressure displacement during balance testing with untethered exoskeleton assistance compared with baseline. Conclusion: Participant-specific ankle exoskeleton is a feasible and safe intervention that can improve walking economy as well as balance in individuals with PD. © 2020 Wolters Kluwer Health, Inc. All rights reserved.