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Reliability Testing of Vasti Activity Measurements in Taped and Untaped Patellofemoral Conditions During Single Leg Squatting in Healthy Subjects: A Pilot 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, Mile End Hospital, Mann Ward, London E1 4DG, Bancroft Road, United Kingdom

Source: Journal of Bodywork and Movement Therapies Published:2013


Abstract

Introduction: Measuring vasti muscles activity may provide reliable evidence for patellar taping to correct probable malalignment in subjects with patellofemoral pain syndrome (PFPS). The aim of present study was to examine the reliability of vasti activity measurements in different patellofemoral conditions during squatting in healthy subjects. Methods: Using an electromyography (EMG) unit, the ratio amplitudes and onsets of VMO and VL muscles of twelve healthy subjects were assessed during single leg squatting. Data was collected from surface electrodes placed over the muscle bellies of the VMO and VL. This procedure was performed on the right knees, before (BT), during (WT) and shortly after patellar taping (SAT). Results: While the CV (coefficient of variation), ICC (intra class correlation coefficient), LSD (least significant difference) and SEM (standard error of measurement) values revealed the high reliability of the VMO/VL amplitude measurements during single leg squatting (. p<0.05), the related values demonstrated poor to moderate reliability of VMO-VL onset measurements during the similar activity (. p<0.05). Conclusion: Reliability tests conducted during the current study showed that, while the relative amplitude of vasti could be used as highly reliable parameter, the muscle onsets of vasti had poor to moderate reliability. © 2012 Elsevier Ltd.
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