title: The effect of three-dimensional postural change on shear elastic modulus of the iliotibial band.
abstract: To understand and treat iliotibial band (ITB) syndrome, caused by excessive compression between the ITB and lateral femoral condyle, it is important to identify factors contributing to an increase in ITB stiffness. The purpose of this study was to clarify the factors that contribute to an increase in ITB stiffness by examining the relationship between three-dimensional postural changes and ITB stiffness. Fourteen healthy individuals performed one-leg standing under 7 conditions (including normal one-leg standing as a control condition) in which the pelvic position was changed in three planes. The shear elastic modulus in the ITB was measured using shear-wave elastography, as a measure of ITB stiffness. The three-dimensional joint angles and external joint moments in the hip and knee joints were also measured to confirm the changes in joint angles and external load. Compared to the normal one-leg standing condition, ITB stiffness was significantly increased in the pelvic posterior tilted position (i.e. hip extension), contralateral pelvic dropped position (i.e. hip adduction), and contralateral pelvic posterior rotated position (i.e. hip external rotation). The findings suggest that interventions to reduce hip extension, adduction, and external rotation might be useful if these excessive positional changes are detected in patients with ITB syndrome.
authors.affiliation: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. Electronic address: tateuchi.hiroshige.8x@kyoto-u.ac.jp.
authors.forename: Hiroshige
authors.initials: H
authors.lastname: Tateuchi
authors.affiliation: Division of Physical Therapy, Rehabilitation Units, Shiga University of Medical Science Hospital, Tsukiwa-cho, Seta, Otsu, Shiga 520-2192, Japan.
authors.forename: Sakiko
authors.initials: S
authors.lastname: Shiratori
authors.affiliation: Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Ichihashi
mesh_terms: D000328:Adult; D055119:Elastic Modulus; D005260:Female; D006801:Humans; D058745:Iliotibial Band Syndrome / Q000503:physiopathology*; D007719:Knee Joint / Q000502:physiology* / Q000503:physiopathology; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology* / Q000503:physiopathology; D011187:Posture
keywords: Hip; Iliotibial band; Posture; Shear wave elastography