Copers adopt an altered movement pattern compared to individuals with chronic ankle instability and control groups in unexpected single-leg landing and cutting task |
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| Affiliation: | 1. Niigata University of Health and Welfare, Institute for Human Movement and Medical Sciences, Niigata, Japan;2. Tominagakusano Clinic, Niigata, Japan;1. KU Leuven Movement Control and Neuroplasticity Research Group, Leuven, Belgium;2. KU Leuven Human Movement Biomechanics Research Group, Leuven, Belgium;3. KU Leuven Research Group for Musculoskeletal Rehabilitation, Faculty of Kinesiology and Rehabilitation Sciences, Group Biomedical Sciences, 3001 Leuven, Belgium;4. Department of Research, Development & Education, Sint Maartenskliniek, Nijmegen, The Netherlands;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 Physical Therapy and Rehabilitation, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium;2. Department of Biostatistics and Informatics, Vrije Universiteit Brussel, Laarbeeklaan, 103, 1090 Brussels, Belgium;3. Department of Physical Therapy and Rehabilitation, Universiteit Gent, De Pintelaan 185, 9000 Gent, Belgium;1. Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine Department, Rey Juan Carlos University, Madrid, Spain;2. Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain |
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| Abstract: | Individuals with chronic ankle instability (CAI) demonstrate altered ankle kinematics during landing compared to uninjured individuals. However, if copers may have adopted unique movement strategy to prevent repeated ankle sprains is unclear. The purpose of this study compares the lower-extremity joint kinematics and muscle activities of CAI (N = 8), coper (COP) (N = 8), and control (CON) (N = 8) groups in unexpected single-leg landing and cutting. Performance time (from initial contact to toe-off), number of mistakes in the jumping direction, low-extremity joint angle are assessed. Muscle activities were recorded from the tibialis anterior, medial gastrocnemius, and peroneus longus (PL), and mean muscle activity, co-contraction index (CI), and PL latency were analyzed. Results of performance time and CI are not significant. Significantly less number of mistakes in the jumping direction and a shorter PL latency were discovered in the COP and CON compared with the CAI group (P < 0.05). The peak hip joint flexion angle is significantly smaller in the COP than in the CON (P = 0.04). In dynamic tasks requiring quick judgments of ankle inclination, the COP may be able to accurately sense the inclination of the foot. Additionally, movement strategies differed between the COP and CON groups in an unexpected single-leg landing and cutting. |
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| Keywords: | Lateral ankle sprain Chronic ankle instability Coper Single-leg landing and cutting |
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