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Does Leg Predomination Affect the Measurement of Patellofemoral Joint Reaction Force (Pfjrf) During Single Leg Squatting?: A Reliability Study Publisher Pubmed



Mostamand J1 ; Bader DL2 ; Hudson Z3
Authors
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Authors Affiliations
  1. 1. Musculoskeletal Research Centre, Faculty of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan 8174673461, PO Box 164, Iran
  2. 2. Faculty of Health Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
  3. 3. Centre for Sports and Exercise Medicine, Barts and the London Queen Mary's School of Medicine and Dentistry, Mann Ward, Mile End Hospital, London E1 4DG, Bancroft Road, United Kingdom

Source: Journal of Bodywork and Movement Therapies Published:2012


Abstract

Introduction: Although measuring patellofemoral joint reaction forces (PFJRF) may provide reliable evidence for conservative treatments to correct probable malalignment in subjects with patellofemoral pain syndrome (PFPS), it may be necessary to determine whether the inherent properties of the dominant leg influences the reliability of measuring PFJRF. The aim of the present study was to examine the effect of leg predomination on reliability testing of the PFJRF measurement during single leg squatting in healthy subjects. Methods: Using a motion analysis system and one force plate, PFJRF of 10 healthy subjects with a right dominant leg was assessed during single leg squatting. Data was collected from superficial markers taped to selected landmarks. This procedure was performed on the both right and left legs, during three separate single leg squats from a neutral position to a depth of approximately 30° of knee flexion. Subjects were then asked to repeat the test procedure after a minimum of a week's interval. The PFJRF was calculated using a biomechanical model of the patellofemoral joint. Results: There was significant difference between the PFJRF mean values of paired test of right (mean, SD of 1887.7, 325.1 N) and left knees (mean, SD of 2022.6, 270.5 N) (p < 0.05). The CV (coefficient of variation) values during within and between session tests, revealed the high repeatability and reproducibility of PFJRF measurements on both knees. The ICC (intra class correlation coefficient) values during within and between sessions tests showed the high reliability of these measurements on both knees. Conclusion: The high reliability of PFJRF measurements on both dominant and non-dominant legs of healthy subjects suggests that the PFJRF measurement would not be influenced by the leg predomination during single leg squatting. © 2011 Elsevier Ltd.
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