Kinematic,kinetic and electromyographic differences between young adults with and without chronic ankle instability during walking |
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| Institution: | 1. Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Canada;2. Department of Human Kinetics, Université du Québec à Trois-Rivières, Trois-Rivières, Canada;3. Groupe de recherche sur les affections neuro-musculo-squelettiques (GRAN), Canada;1. Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China;2. Gait and Motion Analysis Center, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China;1. Department of Physical Therapy – Program in Exercise & Rehabilitation Science, Marquette University, Cramer Hall 004B, 604 N. 16th St. 004B, Milwaukee, WI, 53233, USA;2. School of Kinesiology, University of Michigan, CCRB 4745G, 401 Washtenaw Ave., Ann Arbor, MI, 48109-2214, USA;3. Orthopaedic and Rehabilitation Biomechanics Laboratory, University of Michigan, CCRB 4745G, 401 Washtenaw Ave., Ann Arbor, MI, 48109-2214, USA;4. Department of Physical Therapy – Program in Exercise & Rehabilitation Science, Marquette University, Cramer Hall 215D, 604 N. 16th St. 215D, Milwaukee, WI, 53233, USA;1. Department of Kinesiology, California State University, Chico, United States;2. Department of Physical Therapy and Athletic Training, Northern Arizona University, United States;3. Department of Kinesiology, University of Georgia, United States;4. Department of Athletic Training and Kinesiology, Oregon State University, United States;5. Department of Educational Psychology, University of Georgia, United States;1. University of Hertfordshire, College Lane Campus, Hatfield, Hertfordshire, AL10 9AB, United Kingdom;2. University of San Francisco, 2130 Fulton Street, San Francisco, CA, 94117, United States;3. University of Bedfordshire, Polhill Avenue, Bedford, Bedfordshire, MK41 9EA, United Kingdom |
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| Abstract: | The objective of this study was to quantify the kinematic, kinetic and electromyography differences between individuals with and without chronic ankle instability (CAI) during comfortable (CW) and fast (FW) walking. Twenty-one individuals with CAI and 21 healthy controls were recruited to walk at CW and FW speeds. The dependent variables were gluteus medius, vastus lateralis, gastrocnemius lateralis, gastrocnemius medialis, peroneus longus and tibialis anterior muscles mean activity, ankle and knee angles and moments. Kinematic, kinetic and electromyography variables were compared between groups with a one-dimensional statistical non-parametric mapping analysis. The CAI group exhibited no significant difference for ankle angles and moments compared to the control group. However, the CAI group showed less external knee rotation from 56 to 100% (CW) and 51 to 98% (FW) and more knee abduction moment from 1 to 6% and 7 to 9% (CW) and 1 to 2% (FW) of the stance phase. Less gluteus medius muscle activity was also observed from 6 to 9% and 99 to 100% (CW) of the stance phase for the CAI group. These results suggest proximal biomechanical compensations and will help better understand the underlying deficits associated with CAI. They also indicate that regardless of walking speeds, individuals with CAI exhibit similar differences compared to healthy participants. |
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| Keywords: | Chronic ankle instability Kinematics Kinetics Electromyography Walking |
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