title: Sit-To-Stand Biomechanics Before and After Total Hip Arthroplasty.
abstract: The purpose of this study was to evaluate changes in movement patterns during a sit-to-stand (STS) task before and after total hip arthroplasty (THA), and to compare biomechanical outcomes after THA to a control group. Forty-five subjects who underwent THA and twenty-three healthy control subjects participated in three-dimensional motion analysis. Pre-operatively, subjects exhibited inter-limb movement asymmetries with lower vertical ground reaction force (VGRF) and smaller moments on the operated limb. Although there were significant improvements in movement symmetry 3 months after THA, patients continued to demonstrate lower VGRF and smaller moments on the operated limb compared to non-operated and to control limbs. Future studies should identify the contributions of physical impairments and the influence of surgical approach on STS biomechanics.
authors.affiliation: Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware; Faculty of Rehabilitation Sciences, The University of Jordan, Amman, Jordan.
authors.forename: Sumayeh B
authors.initials: SB
authors.lastname: Abujaber
authors.affiliation: Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware.
authors.forename: Adam R
authors.initials: AR
authors.lastname: Marmon
authors.affiliation: Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware.
authors.forename: Federico
authors.initials: F
authors.lastname: Pozzi
authors.affiliation: Delaware Orthopaedic Specialists, Newark, Delaware.
authors.forename: James J
authors.initials: JJ
authors.lastname: Rubano
authors.affiliation: Biomechanics and Movement Science Program, University of Delaware, Newark, Delaware; Department of Physical Therapy, University of Delaware, Newark, Delaware.
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Zeni
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D015331:Cohort Studies; D005260:Female; D006621:Hip Joint / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009068:Movement; D015207:Osteoarthritis, Hip / Q000503:physiopathology*
keywords: biomechanics; joint moment; lateral trunk angle; sit to stand; total hip arthroplasty