Overground Gait Adaptation to Asymmetric Hip Stiffness Applied by a Robotic Exoskeleton


Presenter: Daria Trosteanetchi

Faculty Sponsor: Meghan Huber

School: UMass Amherst

Research Area: Medical Sciences

Session: Poster Session 6, 4:15 PM - 5:00 PM, 163, C31

ABSTRACT

This research investigates the potential of a robotic hip exoskeleton to address gait asymmetry through overground training, offering a portable alternative to traditional treadmill-based rehabilitation methods. Gait asymmetry, common among stroke survivors and individuals with neurological impairments, often increases metabolic energy expenditure during walking, and heightens the risk of musculoskeletal injuries, leading to overall reduced mobility. Existing interventions, such as split-belt treadmill training, show limited effectiveness in promoting improvements in natural walking environments. This feasibility study aims to determine whether overground application of asymmetric stiffness via a robotic hip exoskeleton can induce adaptive gait responses similar to or exceeding those observed in treadmill-based studies. A custom-built exoskeleton, applies asymmetric stiffness to the hip joints, simulating a torsional spring system. Participants will walk overground in three phases: baseline (exoskeleton off), intervention (exoskeleton applying stiffness), and post-intervention (exoskeleton off). Data on hip range of motion and spatiotemporal gait metrics will be collected using synchronized inertial measurement units (IMUs) designed for the study. The study hypothesizes that participants will adapt to the asymmetric forces applied by the exoskeleton and exhibit overcorrecting after-effects once the stiffness is removed, indicating lasting neuro-motor adaptation. By exploring overground exoskeleton training, this research addresses a critical gap in rehabilitation, offering the potential of a more accessible, real-world solution for individuals with gait asymmetry. Findings will inform the development of effective, portable rehabilitation tools, enhancing mobility and independence for diverse patient populations.

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