Résumé : | Background: There is a lack of data that could address the effects of off-the-shelf insoles on gait variables in healthy people. Methods: Thirty-three healthy volunteers ranging in age from 18 to 35 years were included to this study. Kinematic and kinetic data were obtained in barefoot, shoe-only, steel insole, silicone insole, and polyurethane insole conditions using an optoelectronic three-dimensional motion analysis system. A repeated measures analysis of variance test was used to identify statistically significant differences between insole conditions. The alpha level was set at P , .05 Results: Maximum knee flexion was higher in the steel insole condition (P , .0001) compared with the silicone insole (P ¼ .001) and shoe-only conditions (P ¼ .032). Reduced maximum knee flexion was recorded in the polyurethane insole condition compared with the shoe-only condition (P ¼ .031). Maximum knee flexion measured in the steel insole condition was higher compared to the barefoot condition (P ¼ .020). Higher maximum ankle dorsiflexion was observed in the barefoot condition, and there were significant differences between the polyurethane insole (P , .0001), silicone insole (P ¼ .001), steel insole (P ¼ .002), and shoe conditions (P ¼ .004). Least and highest maximum ankle plantarflexion were detected in the steel insole and silicone insole conditions, respectively. Maximum ankle plantarflexion in the barefoot and steel insole conditions (P ¼ .014) and the barefoot and polyurethane insole conditions (P ¼ .035) were significant. There was no significant difference between conditions for ground reaction force or joint moments. Conclusions: Insoles made by different materials affect maximum knee flexion, maximum ankle dorsiflexion, and maximum ankle plantarflexion. This may be helpful during the decision-making process when selecting the insole material for any pathological conditions that require insole prescription |