Characteristics of clinical measurements between biomechanical responders and non-responders to a shoe designed for knee osteoarthritis |
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| Affiliation: | 1. Department of Physical Therapy, College of Medical Sciences, Jeonju University, Republic of Korea;2. Allied Health Research Unit, University of Central Lancashire, UK;3. Section of Rheumatology, Rush University Medical Center, Chicago IL, USA;4. Departamento de Fisioterapia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Brazil;1. School of Engineering and Applied Science, University of Virginia, Charlottesville, VA 22904, USA;2. Department of Mechanical Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland;1. Department of Podiatry, Health & Rehabilitation Research Institute, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand;2. Department of Biostatistics & Epidemiology, Faculty of Health and Environmental Sciences, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand;3. Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand;4. Ko Awatea, Counties Manukau District Health Board, Private Bag 93311, Auckland 1640, New Zealand;1. Department of Mechanical Engineering, College of Engineering, Michigan State University, East Lansing, MI, USA;2. MSU Center for Orthopedic Research, College of Osteopathic Medicine, Michigan State University, Lansing, MI, USA;3. Department of Osteopathic Surgical Specialties, College of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA;4. School of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea;1. Physiotherapy Department, Queen Elizabeth Hospital, Hong Kong;2. Department of Rehabilitation Sciences, Hong Kong Polytechnic University, Hong Kong |
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| Abstract: | PurposeThe purpose of this study was to investigate the characteristics of biomechanical and clinical measurements in relation to the knee adduction moment when wearing a standard shoe and a shoe design for individuals with knee osteoarthritis (Flex-OA).MethodsKinematic and kinetic data were collected from thirty-two healthy individuals (64 knees) using a ten camera motion analysis system and four force plates. Subjects performed 5 walking trials under the two conditions and the magnitude of individuals’ biomechanical responses where explored in relation to the clinical assessment of the Foot Posture Index, hip rotation range, strength of hip rotators, and active ankle-foot motion, all of which have been described as possible compensation mechanisms in knee osteoarthritis.ResultsSignificant reductions in the first peak of the knee adduction moment (KAM) during stance phase (9.3%) were recorded (p < 0.0001). However, despite this difference, 22 of 64 knees showed either no change or an increased KAM, indicating a non-response or negative-response to the Flex-OA shoe. Significant differences were observed between the responder and non-responder subgroups in the hip rotation range ratio (p = 0.044) and the hip rotators strength ratio (p = 0.028).ConclusionSignificant differences were seen in clinical assessments of hip rotation range and hip rotator strength between responders and non-responders using a cut-off of 0.02 Nm/kg change in the KAM. |
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| Keywords: | Knee adduction moment Hip rotation Knee osteoarthritis |
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