Proximal and distal muscle thickness is different in women with patellofemoral pain but is not associated with knee frontal plane projection angle |
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| Institution: | 1. Exercise Physiology and Physical Assessment Laboratory, Serra Gaucha University Center, Caxias do Sul, RS, Brazil;2. Exercise Research Laboratory, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil;3. Physique Physiotherapy Centre, Porto Alegre, RS, Brazil;1. University of São Paulo, Post-Graduation Program Interunits Bioengineering EESC/FMRP/IQSC-USP, São Carlos, Brazil;2. Educational Faculty of Francisco Beltrão, Physical Therapy Department, Francisco Beltrão, Brazil;3. University of São Paulo State, School of Science and Technology, Physical Therapy Department, Presidente Prudente, Brazil;1. South West Yorkshire Foundation Trust, Barnsley, UK;2. Allied Health Research Unit, University of Central Lancashire, Preston, UK;3. Department of Health Professions, Manchester Metropolitan University, UK;1. Laboratory of Biomechanics and Motor Control (LABCOM), School of Science and Technology, Sao Paulo State University (UNESP), Presidente Prudente, Sao Paulo, Brazil;2. Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California, United States;3. Exercise Neuroscience Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Sao Paulo, Brazil;1. Physical Therapy Department, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran;2. Student Research Committee, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran;3. Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;1. Graduate Programs in Rehabilitation Science, University of British Columbia, Vancouver, BC, Canada;2. Department of Physical Therapy, University of British Columbia, Vancouver, BC, Canada;3. School of Health & Rehabilitation Sciences, University of Queensland, Brisbane, QLD, Australia;4. Faculty of Health Sciences, Western University, London, ON, Canada |
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| Abstract: | ObjectiveThe aim of this study was to compare proximal and distal muscle thickness between patellofemoral pain (PFP) and asymptomatic women (CG) and to verify the possible association between morphology and lower limb alignment during single leg-squat.MethodsThirty women (PFP, n = 15 and CG, n = 15) performed the following evaluations: (i) muscle thickness of external oblique (EO), gluteus medius (GMed), tensor fascia latae (TFL), peroneus (PER) and tibialis anterior (TA); (ii) knee frontal plane projection angle (FPPA) during single-leg squat.ResultsCompared with the CG, PFP showed: (1) smaller GMed (−10.02%; p = 0.04; effect size = 0.82), greater TFL (+18.44%; p = 0.02; effect size = 0.92) and PER (+14.23%; p = 0.02; effect size = 0.87) muscle thickness and greater knee FPPA during single-leg squat (+31.8%; p = 0.04; effect size = 1.12). No differences were observed in EO (+7.17%; p = 0.37; effect size = 0.34) and TA (−1.35%; p = 0.81; effect size = 0.12) muscle thickness. Additionally, we failed to observe significant associations between muscle morphology and knee FPPA in both groups.ConclusionPFP patients showed alterations in proximal and distal muscle thickness, despite the lack of association with poor lower limb alignment. Prospective studies are necessary to determine if differences in muscle morphology are the cause or the consequence of PFP and to confirm the absence of relationship with lower limb alignment. |
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| Keywords: | Patellofemoral pain Trunk Hip Ankle Muscle morphology Kinematics |
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