Rear foot kinematics when wearing lateral wedge insoles and foot alignment influence the effect of knee adduction moment for medial knee osteoarthritis

Highlights • The immediate biomechanical effects of lateral wedge insoles were investigated. • Knee osteoarthritis participants were categorized as normal or abnormal foot group. • Lateral wedge insoles have a positive effect in the normal foot group. • Reduction in peak knee adduction moment was correlated with reduced rear foot motion. • Foot alignment and rear foot kinematics are key role of biomechanical effects.