title: The Effects of a Lateral Wedge Insole on Knee and Ankle Joints During Slope Walking.
abstract: The purpose of this study was to determine whether a lateral wedge insole reduces the external knee adduction moment during slope walking. Twenty young, healthy subjects participated in this study. Subjects walked up and down a slope using 2 different insoles: a control flat insole and a 7° lateral wedge insole. A three-dimensional motion analysis system and force plate were used to examine the knee adduction moment, the ankle valgus moment, and the moment arm of the ground reaction force to the knee joint center in the frontal plane. The lateral wedge insole significantly decreased the moment arm of the ground reaction force, resulting in a reduction of the knee adduction moment during slope walking, similar to level walking. The reduction ratio of knee adduction moment by the lateral wedge insole during the early stance of up-slope walking was larger than that of level walking. Conversely, the lateral wedge insole increased the ankle valgus moment during slope walking, especially during the early stance phase of up-slope walking. Clinicians should examine the utilization of a lateral wedge insole for knee osteoarthritis patients who perform inclined walking during daily activity, in consideration of the load on the ankle joint.
authors.affiliation: Rehabilitation Division, Kagoshima Prefectural Hokusatsu Hospital, Ohkuchimiyahito, Isa-shi, Kagoshima, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Uto
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Maeda
authors.forename: Ryoji
authors.initials: R
authors.lastname: Kiyama
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kawada
authors.forename: Ken
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Akihiko
authors.initials: A
authors.lastname: Ohwatashi
authors.forename: Kiyohiro
authors.initials: K
authors.lastname: Fukudome
authors.forename: Tadasu
authors.initials: T
authors.lastname: Ohshige
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Yoshimoto
authors.forename: Kazunori
authors.initials: K
authors.lastname: Yone
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D000328:Adult; D000843:Ankle Joint / Q000502:physiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D061826:Foot Orthoses; D005684:Gait / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012775:Shoes; D016138:Walking / Q000502:physiology*