Using Modular Powered Orthoses to Improve Movement in Adults and Older Adults with Lower-Limb Weakness or Injury

What this Trial Is About

Researchers are developing modular, powered lower-limb orthoses designed to fit specific weakened joints and assist voluntary motion in diverse patient groups. Unlike traditional orthoses that limit joint movement, these devices use high-torque, low-inertia motors controlled by energy shaping methods to provide partial assistance without restricting natural motion. The study aims to test the feasibility of these orthoses in improving lifting and lowering posture in healthy adults and functional outcomes in elderly individuals. The intervention involves participants wearing modular powered orthoses equipped with motors that can be freely rotated by the users joints, reducing perceived weight and inertia during movement. These actuators are mounted on commercial orthoses for clinical customization. Participants will perform various tasks while wearing the device to assess its effects. The study includes both able-bodied young adults and elderly participants, with assessments conducted under different experimental conditions with and without the orthosis. Participants will be evaluated on muscle effort, biological torque, gait speed, joint power, time to complete liftinglowering tasks, and sit-to-stand ability using minimum chair height. Additional measures include user satisfaction, thorax angle, and stair ascent gait style. Assessments are done during the same day for each condition. The total study duration varies, with participation involving wearing the device while performing prescribed movements and completing functional tests. Safety and feasibility will be monitored throughout the process.

Enhancing Voluntary Motion in Broad Patient Populations With Modular Powered Orthoses