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Study aim
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The main purposes of this study are the comparison of some of center of pressure(COP) parameters in static balance task while standing on reconstructed limb before and after intervention in each group and between groups, also survey of correlation between COP parameters and level of functional disability measured by KOOS questionnaire in people with anterior cruciate ligament (ACL) reconstruction .
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Design
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Clinical trial with parallel control group, double blind and randomized grouping, 15 people in each group
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Settings and conduct
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This study will be carried out at the Biomechanics Lab of rehabilitation sciences faculty. Individuals in intervention group will do progressive balance training simultaneously with motor tasks for 20 minutes, 3 sessions a week for 6 weeks. The control group will just do balance training. Participants, researcher, and data recorder and analyzer will be blind to groups.
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Participants/Inclusion and exclusion criteria
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In this study the people with unilateral anterior cruciate ligement reconstruction surgery by hamstring tendon allograft and ability of full weight bearing on reconstructed limb and at least 120 degree reconstructed knee range of motion will participate; and they will be eliminated if they have a history of neurological, vestibular and visual disorder, injury or surgery of the spine or other segments of involved limb or other ligaments of the reconstructed knee.
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Intervention groups
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In this study intervention group will do balance training and motor tasks simultaneously (Dual Task). However, control group will just do balance training (Single Task).
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Main outcome variables
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Center of pressure(COP) parameters include sway amplitude, velocity, path length and Mean Square (RMS) amplitude and velocity of COP in anterior-posterior and medial-lateral direction, total path length of COP , ellipse sway area and KOOS questionnaire score.