University of Maryland, Baltimore
The goal of this pilot clinical trial is to test whether training with a portable ankle robot improves ankle push-off and walking speed in adults with chronic stroke who have ankle weakness. The study will also evaluate whether the device is safe and practical to use during walking rehabilitation. The main questions it aims to answer are: Does training with the portable ankle robot improve paretic ankle propulsion during walking? Does training with the portable ankle robot improve walking speed at self-selected and fast walking speeds? Participants will: Complete 30 training sessions of treadmill and overground walking while wearing the portable ankle robot, 3 to 4 times per week over 8 to 9 weeks Complete walking and movement assessments before training, after 15 sessions, and after 30 sessions Walk at self-selected and fast speeds while researchers measure ankle propulsion, gait symmetry, and walking speed
This is a single-arm pilot study evaluating robotic error augmentation of paretic ankle propulsion during gait training in adults with chronic stroke. Ten participants with chronic (\>6 months) stroke and residual ankle weakness will complete 30 training sessions using the AMBLE portable ankle exoskeleton. Assessments are conducted at baseline, after 15 sessions, and after 30 sessions. The hypothesis is that 30 sessions of robot-assisted treadmill gait training enhances paretic ankle plantarflexion propulsive torque and gait symmetry. Approximately half of stroke survivors are left with chron…
Inclusion Criteria: * Chronic stroke, more than 6 months post-stroke * Clinical evidence of hemiparetic gait * Ankle dorsiflexion and plantarflexion strength on the affected side graded 1/5 (trace contraction) to 4/5 (reduced strength) on manual muscle testing * Able to independently complete the 10-Meter Walk Test at a walking speed less than 1.0 m/s, with or without an assistive device Exclusion Criteria: * Self-reported unstable angina, myocardial infarction within the past 3 months, congestive heart failure (NYHA Class II), or hemodynamically significant valvular disease * Self-reported…
The AMBLE is a portable robotic ankle exoskeleton designed to provide individualized assistance and/or resistance during gait training. The device uses adaptive impedance-based control and real-time gait detection to provide dorsiflexion assistance during swing and plantarflexion assistance or resistance during push-off based on participant performance. It is used during treadmill and overground walking to promote recovery of ankle motor control and walking function.
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