Validation of magneto-inertial measuring units for measuring hip joint angles |
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| Institution: | 1. Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA;2. Department of Physical Therapy & Athletic Training, Boston University, Boston, MA 02215, USA;3. Department of Bioengineering, Northeastern University, Boston, MA 02115, USA;1. The Bionics Institute, East Melbourne, Australia;2. Department of Medical Bionics, University of Melbourne, Australia;3. Department of Computer Science and Information Technology, Royal Melbourne Institute of Technology, Victoria, Australia;4. Department of Neurology, Royal Melbourne Hospital, Australia;5. Department of Medicine and Radiology, University of Melbourne, Australia;6. Centre for Neuroscience of Speech, University of Melbourne, Victoria, Australia;7. Redenlab, Victoria, Australia;8. Department of Neurodegeneration, Hertie Institute for Clinical Brain Research, University of Tübingen, Germany;9. Florey Institute of Neuroscience and Mental Health, Victoria, Australia;10. Department of Neuroscience, Central Clinical School, Monash University, Victoria, Australia;1. Interuniversity Centre of Bioengineering of the Human Neuromusculoskeletal System, University of Rome “Foro Italico”, Roma, Italy;2. Department of Human, Sports, and Health Science, University of Rome “Foro Italico”, Roma, Italy;3. Department of Electronics and Telecommunications, Polytechnic of Turin, Torino, Italy;1. Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Canada;2. Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway;3. Aspetar Injury & Illness Prevention Program, Aspetar, Qatar;4. Orthopaedic and Sports Medicine Hospital, Doha, Qatar;5. Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada;6. Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada;7. Glen Sather Sports Medicine Clinic, University of Alberta, Edmonton, Canada;1. Machine Learning and Data Analytics Lab, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Germany;2. Mechanical Engineering Department, Cleveland State University, USA |
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| Abstract: | Camera-based motion capture systems are the current gold standard for motion analysis. However, the use of wireless inertial sensor-based systems is increasing in popularity, largely due to convenient portability. The purpose of this study was to validate the use of wireless inertial sensors for measuring hip joint motion with a functional calibration requiring only one motion (walking) and neutral standing. Data were concurrently collected using a 10-camera motion capture system and a wireless inertial sensor-based system. Hip joint angles were measured for 10 participants during walking, jumping jack, and bilateral squat tasks and for a subset (n = 5) a jump turn task. Camera-based system hip joint angles were calculated from retro-reflective marker positions and sensor-based system angles were calculated in MATLAB using the sensor output quaternions. Most hip joint angles measured with the sensor-based system were within 6° of angles measured with the camera motion capture system. Accurate measurement of motion outside of a laboratory setting has broad implications for diagnosing movement abnormalities, monitoring sports performance, and assessing rehabilitation progress. |
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| Keywords: | Inertial measurement units Hip motion Pervasive sensing |
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