Neuromuscular response of hip-spanning and low back muscles to medio-lateral foot center of pressure manipulation during gait |
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| Affiliation: | 1. Biorobotics and Biomechanics Lab (BRML), Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel;2. Department of Orthopedics B, Rambam Medical Center, Haifa, Israel;3. Physical Therapy Department, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel;4. Department of Orthopedic Surgery, Ha’Emek Medical Center, Afula, Israel;1. Division of Biokinesiology and Physical Therapy, University of Southern California, 1540 Alcazar St., CPH 155, Los Angeles, CA 90266, United States;2. Department of Physical Therapy, University of Delaware, United States;3. Department of Orthopaedics and Rehabilitation Services, Christiana Health Care System, United States;1. The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medical College, New York, New York;2. Department of Obstetrics and Gynecology, New York Presbyterian Hospital/Weill Cornell Medical College, New York, New York;3. Department of Surgery, New York Presbyterian Hospital/Weill Cornell Medical College, New York, New York;1. Department of Applied Physiology and Kinesiology, University of Florida, FL, USA;2. Department of Physical Therapy, University of Florida, FL, USA;1. Pelvi Urogynecology and Gynecological Surgery, Brasilia, Brazil;2. Institute for Laparoscopy and Robotics, São Paulo, Brazil;3. Department of Neuropelveology, University of Aarhus, Aarhus, Denmark;1. Department of Surgical Specialties and Nephrology, University “Federico II” of Naples, Italy;2. Department of Surgery and Advanced Technologies, University “Federico II” of Naples, Italy;1. School of Biomedical Engineering, Dalhousie University, Halifax, NS, Canada;2. School of Health and Human Performance, Dalhousie University, Halifax, NS, Canada;3. School of Physiotherapy, Dalhousie University, Halifax, NS, Canada |
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| Abstract: | Background: Footwear-generated medio-lateral foot center of pressure manipulation has been shown to have potential positive effects on gait parameters of hip osteoarthritis patients, ultimately reducing maximum joint reaction forces. The objective of this study was to investigate effects of medio-lateral foot center of pressure manipulation on muscle activity of hip-spanning and back muscles during gait in bilateral hip osteoarthritis patients. Methods: Foot center of pressure was shifted along the medio-lateral foot axis using a foot-worn biomechanical device allowing controlled center of pressure manipulation. Sixteen female bilateral hip osteoarthritis patients underwent electromyography analysis while walking in the device set to three parasagittal configurations: neutral (control), medial, and lateral. Seven hip-spanning muscles (Gluteus Medius, Gluteus Maximus, Tensor Fascia Latae, Rectus Femoris, Semitendinosis, Biceps Femoris, Adductor Magnus) and one back muscle (Erector Spinae) were analyzed. Magnitude and temporal parameters were calculated. Results: The amplitude and temporal parameter varied significantly between foot center of pressure positions for 5 out of 8 muscles each for either the more or less symptomatic leg in at least one subphase of the gait cycle. Conclusion: Medio-lateral foot center of pressure manipulation significantly affects neuromuscular pattern of hip and back musculature during gait in female hip bilateral osteoarthritis patients. |
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| Keywords: | Hip osteoarthritis Gait Electromyography Foot center of pressure |
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