title: Immediate efficacy of laterally wedged insoles with arch support on walking in persons with bilateral medial knee osteoarthritis.
abstract: OBJECTIVE
  To investigate the immediate efficacy of laterally wedged insoles with arch support (LWAS) on gait in persons with bilateral medial knee osteoarthritis (OA).
  
  
  METHODS
  A prospective case-control intervention study.
  
  
  METHODS
  A gait laboratory with a 6-camera motion analysis system and 2 forceplates.
  
  
  METHODS
  Fifteen women with bilateral medial knee OA and 15 healthy control subjects (N=30).
  
  
  METHODS
  LWAS.
  
  
  METHODS
  Subjective knee pain and objective biomechanical indices, namely, joint angles and moments in the frontal plane, frontal plane ground reaction force and lever arm, as well as medial/lateral center of mass and center of pressure during gait.
  
  
  RESULTS
  When wearing the LWAS, knee pain during gait in persons with medial knee OA decreased (P=.01). Peak internal knee abductor moments were also reduced (P<.001) with increasing foot progression angles, laterally shifted center of pressure, and a shortened frontal plane lever arm (all P<.05). However, ankle invertor moments were increased (P<.05) when wearing the LWAS.
  
  
  CONCLUSIONS
  Although peak internal knee abductor moment and knee pain were immediately reduced during gait when wearing the LWAS, increased ankle invertor moments were found, suggesting that the LWAS should be used with caution. Strengthening and monitoring the condition of the ankle invertor muscles may be necessary if the LWAS is used as an intervention for persons with bilateral medial knee OA.
authors.affiliation: School of Occupational Therapy, National Taiwan University, Taipei City, Taiwan, ROC; Department of Physical Medicine and Rehabilitation, Taoyuan Armed Forces General Hospital, Taoyuan County, Taiwan, ROC.
authors.forename: Hsiu-Chen
authors.initials: HC
authors.lastname: Yeh
authors.affiliation: Department of Physical Medicine and Rehabilitation, Shin Kong Wu Ho-Su Memorial Hospital, Taipei City, Taiwan, ROC.
authors.forename: Li-Fei
authors.initials: LF
authors.lastname: Chen
authors.affiliation: Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei City, Taiwan, ROC.
authors.forename: Wei-Chun
authors.initials: WC
authors.lastname: Hsu
authors.affiliation: Institute of Biomedical Engineering, National Taiwan University, Taipei City, Taiwan, ROC; Department of Orthopaedic Surgery, School of Medicine, National Taiwan University, Taipei City, Taiwan, ROC.
authors.forename: Tung-Wu
authors.initials: TW
authors.lastname: Lu
authors.affiliation: Department of Physical Medicine and Rehabilitation, Shin Kong Wu Ho-Su Memorial Hospital, Taipei City, Taiwan, ROC; School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan, ROC.
authors.forename: Lin-Fen
authors.initials: LF
authors.lastname: Hsieh
authors.affiliation: School of Occupational Therapy, National Taiwan University, Taipei City, Taiwan, ROC. Electronic address: hlchen@ntu.edu.tw.
authors.forename: Hao-Ling
authors.initials: HL
authors.lastname: Chen
mesh_terms: D000368:Aged; D000842:Ankle / Q000503:physiopathology; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005260:Female; D061826:Foot Orthoses; D005684:Gait / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000503:physiopathology; D059352:Musculoskeletal Pain / Q000209:etiology / Q000534:rehabilitation; D020370:Osteoarthritis, Knee / Q000150:complications / Q000503:physiopathology / Q000534:rehabilitation*; D011446:Prospective Studies; D016138:Walking / Q000502:physiology*
keywords: Biomechanical phenomena; Gait; Knee; Orthoses; Osteoarthritis; Rehabilitation