Cailbhe Doherty1, Chris Bleakley2, Jay Hertel3, Kevin Sweeney4, Brian Caulfield4, John Ryan5, Eamonn Delahunt6. 1. School of Public Health, Physiotherapy and Population Science, University College Dublin, Dublin, Ireland. Electronic address: cailbhe.doherty@ucdconnect.ie. 2. Sport and Exercise Sciences Research Institute, Ulster Sports Academy, University of Ulster, Newtownabbey, Co. Antrim, Northern Ireland, United Kingdom. 3. Department of Kinesiology, University of Virginia, Charlottesville, VA, United States. 4. School of Public Health, Physiotherapy and Population Science, University College Dublin, Dublin, Ireland. 5. St. Vincent's University Hospital, Dublin, Ireland. 6. School of Public Health, Physiotherapy and Population Science, University College Dublin, Dublin, Ireland; Institute for Sport and Health, University College Dublin, Dublin, Ireland.
Abstract
PURPOSE: Evaluate the potentially adaptive movement patterns associated with acute lateral ankle sprain (LAS) using biomechanical analyzes. METHODS: Thirty participants with acute LAS and nineteen controls performed a drop vertical jump (DVJ) task. 3D kinematic and sagittal plane kinetic profiles were plotted for the hip, knee and ankle joints of both limbs for the drop jump (phase 1) and drop landing (phase 2) phases of the DVJ. Inter-limb symmetry and the rate of force development (RFD) relative to bodyweight (BW) during both phases of the DVJ were also determined. RESULTS: The LAS group displayed reduced ankle plantar-flexion on their injured limb during phase 2 of the DVJ, with greater associated inter-limb asymmetry for this movement (p<.05). The LAS group also displayed altered kinetic profiles, with increased inter-limb hip asymmetry for both phases of the DVJ (p<.05). This was associated with a decrease in the LAS participants' injured limb RFD during phase 2 of the DVJ when compared with that of controls (11.76±3.43BW/s vs 14.60±3.20BW/s; p=.01, η(2)=0.14). CONCLUSION: Participants with LAS display potentially aberrant coordination strategies during a DVJ as evidenced by an increased dependence on the non-injured limb.
PURPOSE: Evaluate the potentially adaptive movement patterns associated with acute lateral ankle sprain (LAS) using biomechanical analyzes. METHODS: Thirty participants with acute LAS and nineteen controls performed a drop vertical jump (DVJ) task. 3D kinematic and sagittal plane kinetic profiles were plotted for the hip, knee and ankle joints of both limbs for the drop jump (phase 1) and drop landing (phase 2) phases of the DVJ. Inter-limb symmetry and the rate of force development (RFD) relative to bodyweight (BW) during both phases of the DVJ were also determined. RESULTS: The LAS group displayed reduced ankle plantar-flexion on their injured limb during phase 2 of the DVJ, with greater associated inter-limb asymmetry for this movement (p<.05). The LAS group also displayed altered kinetic profiles, with increased inter-limb hip asymmetry for both phases of the DVJ (p<.05). This was associated with a decrease in the LASparticipants' injured limb RFD during phase 2 of the DVJ when compared with that of controls (11.76±3.43BW/s vs 14.60±3.20BW/s; p=.01, η(2)=0.14). CONCLUSION:Participants with LAS display potentially aberrant coordination strategies during a DVJ as evidenced by an increased dependence on the non-injured limb.
Authors: Jeffrey D Simpson; Ethan M Stewart; Alana J Turner; David M Macias; Harish Chander; Adam C Knight Journal: J Athl Train Date: 2020-01-02 Impact factor: 2.860