Redistribution of joint moments and work in older women with and without hallux valgus at two walking speeds |
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| Affiliation: | 1. Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, Melbourne, The University of Melbourne, VIC, 3010, Australia;2. Department of Physiotherapy, Monash University, Frankston, VIC, Australia;3. Department of Physical Therapy, Des Moines University, Des Moines, IA, USA;4. Department of Kinesiology, Iowa State University, Ames, IA, USA;1. Division of Geriatric Medicine, University of Pittsburgh, 3471 Fifth Avenue, Suite 500, Pittsburgh, PA 15213, USA;2. Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA, USA;3. Department of Physical Therapy, University of Pittsburgh, Bridgeside Point 1, 100 Technology Drive, Suite 210, Pittsburgh, PA 15219, USA;1. University of Utah, Department of Health, Kinesiology, and Recreation, Salt Lake City, UT, USA;2. University of Utah, Eccles Health Science Library, Salt Lake City, UT, USA;3. The University of Exeter, School of Sport and Health Science, Exeter, United Kingdom;1. Connecticut Children’s, 399 Farmington Ave, Farmington, CT 06032, United States;2. Univesity of Hartford, 200 Bloomfield Ave, West Harford, CT 06117, United States;1. Faculty of Sport and Physical Education, University of Belgrade, Serbia;2. Faculty of Sport, University of Ljubljana, Slovenia;1. Faculty of Physical Education, University of Brasilia, Brazil;2. Neuroscience Research Australia, University of New South Wales, Australia;3. Institute for Musculoskeletal Health, The University of Sydney, Australia |
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| Abstract: | BackgroundHallux valgus (HV) is a highly prevalent foot deformity in older women. Differences in lower extremity joint function of older women with and without HV during walking at slower and faster speeds are unknown.Research questionDoes walking speed affect lower extremity joint range of motion (ROM) and net extensor joint moment and associated work in older women with and without HV?MethodsThirteen older women with HV and 13 controls completed five walking trials at 1.1 and 1.3 m·s−1 as kinematic marker position and ground reaction force data were collected. Net ankle, knee, and hip joint moments were computed using inverse dynamics during the stance phase. Positive joint work was calculated by integrating hip power in early stance, knee power in mid stance, and ankle power in late stance.ResultsAverage ankle ROM and plantarflexor moment did not increase with walking speed in the HV group, while in the control group these variables were greater for the faster compared to the slower speed (p < 0.05). The magnitude of increase in ankle joint work with speed was 12 % lesser in the HV compared to the control group (p = 0.008). The hip ROM, extensor moment, and associated work was greater in the HV compared to the control group (p < 0.05). Knee and hip joint ROM, extensor moments, and work increased with walking speed in both groups (p < 0.05).SignificanceOlder women with HV compared to older women without HV demonstrate a distal-to-proximal redistribution by increasing hip motion and effort to compensate for reduced ankle contribution during walking. |
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| Keywords: | Bunions Push-off Plantarflexor Gait Speed |
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