title: DEFORMATION RESPONSE OF THE ILIOTIBIAL BAND-TENSOR FASCIA LATA COMPLEX TO CLINICAL-GRADE LONGITUDINAL TENSION LOADING IN-VITRO.
abstract: BACKGROUND
  Iliotibial Band (ITB) syndrome is a troublesome condition with prevalence as high as 12% in runners. Stretching has been utilized as a conservative treatment. However, there is limited evidence supporting ITB elongation in response to a stretching force.
  The purpose of this study was to describe the iliotibial band tensor fascia lata complex (ITBTFLC) tissue elongation response to a simulated clinical stretchin-vitro. The authors hypothesized that the ITBTFLC would undergo statistically significant elongation when exposed to a clinical-grade stretching regimen, with the majority of the elongation occurring within the proximal ITBTFLC region.
  
  
  METHODS
  Within subjects repeated measuresin-vitrodesign.
  
  
  METHODS
  The strain response of six un-embalmed ITBTFLCs to a simulated clinical stretch of 2.75% elongation was assessed. Four sets of array marks were placed along the length of the ITBTFLC. Photographic images were taken in resting position (with 1.0%in-situelongation) and with an additional 2.75% elongation. Tissue elongation was compared between proximal, middle, and distal ITBTFLC regions.
  
  
  RESULTS
  A paired samplest-testdemonstrated a significantly longer ITBTFLC in the "stretched" versus resting condition (p= 0.001). Significant elongation was observed in the proximal (3.96mm (SD = 1.35);p= 0.001), middle (2.12mm (SD = 1.49);p= 0.018) and distal (2.25mm (SD = 1.37);p= 0.01) regions during the "stretched" versus the resting condition. A one-way ANOVA demonstrated a significant main effect for region (p= 0.002). The proximal region exhibited significantly greater elongation versus the middle (p= 0.003) and distal (p= 0.007) regions, with no significant difference between the middle and distal regions (p= 0.932).
  
  
  CONCLUSIONS
  The results of this study demonstrate that the ITBTFLC is capable of elongation in response to a clinically simulated stretch. The proximal ITB region underwent significantly greater elongation than the middle and distal regions and may be more likely to respond to "stretching" in clinical situations. Future investigation should assess the ITBTFLC load/deformation properties to determine whether a short-term clinically available stretch translates into permanent tissue elongation.
  
  
  METHODS
  III.
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Wilhelm
authors.affiliation: Boma, Physical Therapy Outpatient Clinic, Mariazeller Straße 30, 8605 Kapfenberg, Styria, Austria.
authors.forename: Omer
authors.initials: O
authors.lastname: Matthijs
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: Kevin
authors.initials: K
authors.lastname: Browne
authors.affiliation: University Hospital for Orthopaedics and Trauma Surgery Pius-Hospital, Medical Campus Carl von Ossietzky University Oldenburg, Oldenburg, Germany.
authors.forename: Gesine
authors.initials: G
authors.lastname: Seeber
authors.affiliation: Boma, Physical Therapy Outpatient Clinic, Mariazeller Straße 30, 8605 Kapfenberg, Styria, Austria.
authors.forename: Anja
authors.initials: A
authors.lastname: Matthijs
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: Phillip S
authors.initials: PS
authors.lastname: Sizer
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Brismée
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: C Roger
authors.initials: CR
authors.lastname: James
authors.affiliation: Department of Rehabilitation Sciences, Center for Rehabilitation Research, School of Health Professions, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.
authors.forename: Kerry K
authors.initials: KK
authors.lastname: Gilbert
keywords: Iliotibial band; iliotibial band syndrome; stretch; tensor fascia lata