Si vous n'étiez pas encore convaincu du besoin d'une chaussure rigide ...
pour vos genoux, mais par extension pour l'ensemble de la syncinésie musculo-articulaire de la marche et de la course.
TITLE: Variable-stiffness shoe lowers the knee adduction moment in subjects with symptoms of medial compartment knee osteoarthritis
(Article, English)
AUTHOR: Erhart, JC; Mundermann, A; Elspas, B; Giori, NJ;
Andriacchi, TP
SOURCE: JOURNAL OF BIOMECHANICS 41 (12). AUG 28 2008.
p.2720-2725 ELSEVIER SCI LTD, OXFORD
SEARCH TERM(S): GAIT item_title,keyword,keyword_plus; WALKING item_title,keyword,keyword_plus
KEYWORDS: walking gait; osteoarthritis; load-altering intervention; variable-stiffness shoes; knee adduction moment
KEYWORDS+: VARUS DEFORMITY OSTEOARTHRITIS; LATERALLY WEDGED INSOLES;
HIGH TIBIAL OSTEOTOMY; DISEASE SEVERITY; GAIT ANALYSIS;
FOLLOW-UP; WALKING; JOINT; LOAD; PROGRESSION
ABSTRACT: The purpose of this study was to evaluate the effectiveness of variable-stiffness shoes in lowering the peak external knee adduction moment during walking in subjects with symptomatic medial compartment knee osteoarthritis. The influence on other lower extremity joints was also investigated. The following hypotheses were tested: (1) variable-stiffness shoes will lower the knee adduction moment in the symptomatic knee compared to control shoes: (2) reductions in knee adduction moment will be greater at faster speeds; (3) subjects with
higher initial knee adduction moments in control shoes will have greater reductions in knee adduction moment with the intervention shoes; and (4) variable-stiffness shoes will cause secondary changes in the hip and
ankle frontal plane moments. Seventy-nine individuals were tested at self- selected slow, normal, and fast speeds with a constant-stiffness Control shoe and a variable-stiffness intervention shoe. Peak moments for each
condition were assessed using a motion capture system and force plate.
The intervention shoes reduced the peak knee adduction moment compared to control at all walking speeds, and reductions increased with increasing walking speed. The magnitude of the knee adduction moment prior to
intervention explained only 11.9% of the variance in the absolute change in maximum knee adduction moment. Secondary changes in frontal plane moments showed primarily reductions in other lower extremity joints. This
study showed that the variable-stiffness shoe reduced the knee adduction moment in Subjects with medial compartment knee osteoarthritis without the discomfort of a fixed wedge or overloading other joints, and thus can
potentially slow the progression of knee osteoarthritis. (c) Published by Elsevier Ltd.
AUTHOR ADDRESS: JC Erhart, Stanford Univ, Dept Mech Engn, Durand Bldg 061,
Stanford, CA 94305 USA