Dual-task prioritization during overground and treadmill walking in healthy adults |
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| Affiliation: | 1. The Sheryl & Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children''s Evaluation and Rehabilitation Center (CERC), Department of Pediatrics, Albert Einstein College of Medicine, Van Etten Building — Wing 1C, 1225 Morris Park Avenue, Bronx, New York 10461, USA;2. The Sheryl & Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children''s Evaluation and Rehabilitation Center (CERC), Department of Neuroscience, Albert Einstein College of Medicine, Van Etten Building — Wing 1C, 1225 Morris Park Avenue, Bronx, New York 10461, USA;3. Program in Cognitive Neuroscience, City College of the City University of New York, Department of Psychology, 138th Street & Convent Ave., New York, NY 10031, USA;4. Program in Cognitive Neuroscience, City College of the City University of New York, Department of Biology, 138th Street & Convent Ave., New York, NY 10031, USA;1. Department of Psychological and Brain Sciences, Washington University in St. Louis, USA;2. Department of Biology, Washington University in St. Louis, USA;3. Department of Neurology, Washington University School of Medicine, USA;4. Program in Physical Therapy, Washington University School of Medicine, USA;5. Department of Neuroscience, Washington University School of Medicine, USA;1. The Sheryl & Daniel R. Tishman Cognitive Neurophysiology Laboratory, Children''s Evaluation and Rehabilitation Center (CERC), Department of Pediatrics, Albert Einstein College of Medicine, Van Etten Building — Wing 1C, 1225 Morris Park Avenue, Bronx, NY 10461, USA;2. The Dominick P. Purpura Department of Neuroscience, Rose F. Kennedy Intellectual and Developmental Disabilities Research Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA;3. Program in Cognitive Neuroscience, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA;4. Trinity College Dublin, Centre for Bioengineering, Trinity Biomedical Sciences Institute, 152-160, Pearse Street, Dublin 2, Ireland;5. Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland;6. The Saul R. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA |
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| Abstract: | BackgroundThe dual-task effect on walking performance is different during treadmill and overground walking, though the cause of this difference is unknown. This study examined the effects of task prioritization on overground and treadmill dual-task walking.MethodTwenty-two adults walked overground and on a treadmill under three dual-task conditions: prioritization of walking performance, prioritization of cognitive performance (serial subtraction in sevens), or no prioritization.ResultsCompared to single-task walking, stride velocity was reduced and stride time variability was increased during dual-task overground walking. During treadmill walking, there was no dual-task effect on walking performance, but cognitive task performance was improved. Prioritization of the cognitive task reduced the dual-task effect on stride velocity during overground walking only, whilst prioritization of the walking task reduced cognitive task performance in both walking modalities.SignificanceThese results corroborate recent findings that the dual-task effects on treadmill walking are not equivalent to those on overground walking. Healthy adults appear to prioritize cognitive task performance during treadmill dual-task walking without detrimental effects to gait. During overground walking however, allocation of attention to the secondary task reduces gait performance. These results indicate that treadmill based dual-task paradigms should not be used to infer factors which influence the cognitive control of overground walking. |
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| Keywords: | Gait Dual-task cost Variability Body worn sensors |
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