Increased hip adductor activation during sit-to-stand improves muscle activation timing and rising-up mechanics in individuals with hemiparesis |
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| Affiliation: | 1. Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China;2. Graduate Institute of Athletic Performance, National Taiwan Normal University, Taipei, Taiwan, Republic of China;3. National Defense Medical Center, Taipei, Taiwan, Republic of China;4. Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China;5. College of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China;6. Department of Neurological Surgery, Tri-Service General Hospital, Taipei, Taiwan, Republic of China;7. Department of Neurology, Tri-Service General Hospital, Taipei, Taiwan, Republic of China;8. Department of Physical Therapy, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan, Republic of China;9. Department of Gerontological Health Care, National Taipei University of Nursing and Health Science, Taipei, Taiwan, Republic of China;10. Department of Physical Medicine and Rehabilitation, Tri-Service General Hospital, Taipei, Taiwan, Republic of China;1. Centre of Precision Rehabilitation for Spinal Pain (CPR Spine), School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, UK;2. Department of Integrative Physiology, University of Colorado Boulder, CO, USA;3. Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, Maribor, Slovenia;4. US Department of Veterans Affairs, USA;5. Department of Bioengineering, Imperial College London, London, UK;6. School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia;7. School of Biomedical Sciences, The University of Queensland, Brisbane, Australia;8. LAMHESS, Université Côte d’Azur, Nice, France;9. Institut Universitaire de France (IUF), Paris, France;10. Trinity College Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin, Ireland;11. School of Psychology, Queen’s University Belfast, Belfast, UK;12. School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Australia;13. Worcester Polytechnic Institute, Worcester, MA, USA;14. Department of Rehabilitation and Prevention Engineering, Institute of Applied Medical Engineering, RWTH Aachen University, Aachen, Germany;15. Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands;p. Neuroscience Research Australia, University of New South Wales, Sydney, Australia;q. School of Electrical and Electronic Engineering, University College Dublin, Belfield, Dublin, Ireland;r. Department of Clinical Research and Department of Sports Sciences and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark;s. Auckland Bioengineering Institute and Department of Engineering Science, University of Auckland, Auckland, New Zealand;t. LISiN, Department of Electronics and Telecommunications, Politecnico di Torino, Torino, Italy;u. Brain and Mind Centre, University of Sydney, Sydney, Australia Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia;v. Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, UK;w. Northwestern University, Evanston, IL, USA;x. Shirley Ryan AbilityLab, Chicago, IL, USA;1. Department of Mechanical Engineering, Colorado School of Mines, United States;2. Warfighter Performance Department, Naval Health Research Center, United States;3. Military and Veterans Health Solutions, Leidos, Inc, United States;4. Quantitative Biosciences and Engineering Program, Colorado School of Mines, United States;1. INSERM UMR 1093-CAPS, Bourgogne Franche-Comté University, Faculty of Sport Sciences, Burgundy, Dijon, France;2. Department of Physical Medicine and Rehabilitation, University Hospital Dijon, Burgundy, Dijon, France;3. INSERM CIC 1432, Clinical Investigation Center P Module, Technological Investigation Platform University Hospital Dijon, Burgundy, Dijon, France;4. Kinesiology Laboratory, Geneva University Hospitals and University of Geneva, Geneva, Switzerland;5. Clinical Investigation Center, INSERM CIC-EC 1432, University Hospital Dijon, Burgundy, Dijon, France;6. Division of Rheumatology, Faculty of Medicine, Geneva University Hospitals, Geneva, Switzerland;1. Istanbul Physical Therapy Rehabilitation Training and Research Hospital, Istanbul, Turkey;2. Istanbul Gelisim University, Faculty of Dentistry, Avcilar, Istanbul, Turkey;3. Istanbul Gelisim University, Faculty of Engineering, Avcilar, Istanbul, Turkey;1. Faculty of Sport Sciences, Sivas Cumhuriyet University, Sivas, Turkey;2. Department of Integrative Physiology, University of Colorado, Boulder, CO, USA;3. Faculty of Sport Sciences, Eskisehir Technical University, Eskisehir, Turkey;4. Faculty of Sport Sciences, Kocaeli University, Kocaeli, Turkey;5. MOTION Science Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA;1. Department of Industrial and Systems Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA;2. Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA 24061, USA;3. Product Operations Department at Samsung, Austin, TX 78754, USA;4. Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA;5. Department of Orthopedic Surgery, Harvard Medical School, Cambridge, MA 02138, USA;6. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USA;7. Subject Matter Team in the Worldwide Design & Engineering at Amazon, Seattle, WA 98170, USA |
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| Abstract: | Long sit-to-stand (STS) time has been identified as a feature of impaired functional mobility. The changes in biomechanics of STS performance with simultaneous hip adductor contraction have not been studied, which may limit indications for use of hip adductor activation during STS training.Ten individuals with hemiplegia (mean age 61.8 years, injury time 29.8 ± 15.2 months) performed the STS with and without squeezing a ball between two legs. The joint moments, ground reaction force (GRF), chair reaction force and movement durations and temporal index of electromyography were calculated from the control condition for comparison with those from the ball squeezing condition.Under the squeeze condition, reduced peak vertical GRF during the ascension phase with increased loading rate was observed in the nonparetic limb, and the peak knee extensor moment occurred earlier in the paretic. Earlier activation of tibialis anterior and gluteus maximus, and gluteus medius were found in squeeze STS.Squeezing a ball between limbs during STS increased the contraction timing of tibialis anterior, gluteus maximus, gluteus medius, and soleus as well as a more symmetric rising mechanics encourage the use of squeezing a ball between limbs during STS for individuals with hemiparesis. |
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