Control of lateral weight transfer is associated with walking speed in individuals post-stroke |
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| Affiliation: | 1. Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, MD 21201, United States;2. Department of Physical Therapy, University of Delaware, DE 19716, United States;1. University of Maryland Baltimore School of Medicine, Department of Neurology, 110 S. Paca St, Baltimore, MD 21202, USA;2. IRCCS Fondazione Don Carlo Gnocchi ONLUS, Biomedical Technology Department, via Capecelatro 66, 20148 Milano, Italy;3. Politecnico di Milano, Department of Electronics, Information and Bioengineering, via Golgi 39, 20133 Milano, Italy;1. INRIA Paris, 2 Rue Simone Iff, 75012 Paris, France;2. Sorbonne Universités, UPMC Univ. Paris 6, Laboratoire Jacques-Louis Lions, 75252 Paris, France;3. Medical R&D, WBL Healthcare, Air Liquide Santé International, 1 Chemin de la Porte des Loges, 78350 Les Loges-en-Josas, France;4. Department of Mechanical Engineering, Lafayette College, Easton, PA 18042, USA;1. Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, Italy;2. Department of Chemical Engineering, Imperial College, London, United Kingdom;3. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom;4. Institute of Hydromechanics, National Academy of Sciences of Ukraine, Kyiv, Ukraine;5. Department of cardiothoracic and Respiratory Sciences, Second University of Naples, Naples, Italy;1. Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55414, United States;2. Department of Civil, Environment and Geo-Engineering, University of Minnesota, Minneapolis, MN 55414, United States;3. College of Engineering and Applied Sciences, Stony Brook University, Stony Brook, NY 11794-2200, United States |
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| Abstract: | Restoring functional gait speed is an important goal for rehabilitation post-stroke. During walking, transferring of one’s body weight between the limbs and maintaining balance stability are necessary for independent functional gait. Although it is documented that individuals post-stroke commonly have difficulties with performing weight transfer onto their paretic limbs, it remains to be determined if these deficits contributed to slower walking speeds. The primary purpose of this study was to compare the weight transfer characteristics between slow and fast post-stroke ambulators. Participants (N = 36) with chronic post-stroke hemiparesis walked at their comfortable and maximal walking speeds on a treadmill. Participants were stratified into 2 groups based on their comfortable walking speeds (≥0.8 m/s or <0.8 m/s). Minimum body center of mass (COM) to center of pressure (COP) distance, weight transfer timing, step width, lateral foot placement relative to the COM, hip moment, peak vertical and anterior ground reaction forces, and changes in walking speed were analyzed. Results showed that slow walkers walked with a delayed and deficient weight transfer to the paretic limb, lower hip abductor moment, and more lateral paretic limb foot placement relative to the COM compared to fast walkers. In addition, propulsive force and walking speed capacity was related to lateral weight transfer ability. These findings demonstrated that deficits in lateral weight transfer and stability could potentially be one of the limiting factors underlying comfortable walking speeds and a determinant of chronic stroke survivors’ ability to increase walking speed. |
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| Keywords: | Weight transfer Stroke Gait Walking speed Lateral Stability Balance Hip abduction Loading Propulsion |
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