In-shoe plantar tri-axial stress profiles during maximum-effort cutting maneuvers |
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| Institution: | 1. Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. Li Ning Sports Science Research Center, Beijing, China;1. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland;2. Schoeller Textil AG, Bahnhofstrasse 17, CH-9475 Sevelen, Switzerland;3. Swiss Paraplegic Center, Guido A. Zäch Strasse 1, CH-6207 Nottwil, Switzerland;1. Salford University, School of Health Science, Salford, United Kingdom, Ohio University, Health Sciences Professions, Athens, United States;2. University of Manchester, Manchester, United Kingdom;3. Salford University, School of Health Science, Salford, United Kingdom;1. Centre for Health Sciences Research, University of Salford, Salford, UK;2. School of Engineering, Manchester Metropolitan University, Manchester, UK;1. Toshiba Stroke and Vascular Research Center, University at Buffalo, State University of New York, Buffalo, NY 14203, USA;2. Department of Mechanical and Aerospace Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;3. Department of Neurosurgery, University at Buffalo, State University of New York, Buffalo, NY 14203, USA;4. Department of Radiology, University at Buffalo, State University of New York, Buffalo, NY 14203, USA;5. Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;1. Department of Mechanical Engineering, University of Sheffield, Mappin St, Sheffield S1 3JD, UK;2. Exeter Biomechanics Research Team, University of Exeter, St Lukes Campus, Exeter EX1 2LU, UK |
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| Abstract: | Soft tissue injuries, such as anterior cruciate ligament rupture, ankle sprain and foot skin problems, frequently occur during cutting maneuvers. These injuries are often regarded as associated with abnormal joint torque and interfacial friction caused by excessive external and in-shoe shear forces. This study simultaneously investigated the dynamic in-shoe localized plantar pressure and shear stress during lateral shuffling and 45° sidestep cutting maneuvers. Tri-axial force transducers were affixed at the first and second metatarsal heads, lateral forefoot, and heel regions in the midsole of a basketball shoe. Seventeen basketball players executed both cutting maneuvers with maximum efforts. Lateral shuffling cutting had a larger mediolateral braking force than 45° sidestep cutting. This large braking force was concentrated at the first metatarsal head, as indicated by its maximum medial shear stress (312.2±157.0 kPa). During propulsion phase, peak shear stress occurred at the second metatarsal head (271.3±124.3 kPa). Compared with lateral shuffling cutting, 45° sidestep cutting produced larger peak propulsion shear stress (463.0±272.6 kPa) but smaller peak braking shear stress (184.8±181.7 kPa), of which both were found at the first metatarsal head. During both cutting maneuvers, maximum medial and posterior shear stress occurred at the first metatarsal head, whereas maximum pressure occurred at the second metatarsal head. The first and second metatarsal heads sustained relatively high pressure and shear stress and were expected to be susceptible to plantar tissue discomfort or injury. Due to different stress distribution, distinct pressure and shear cushioning mechanisms in basketball footwear might be considered over different foot regions. |
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| Keywords: | Lateral shuffling Sidestep cutting Shear stress Skin and soft tissue |
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