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Could ground reaction forces be used to evaluate the stability of the shoe during locomotion?

The aim of this study is to determine if ground reaction forces (GRF) could be a significant parameter to evaluate the stability of the shoe. According to Forner Cordero (2003), the stability of an object is its capacity to maintain a balance and to resume its position (or sway) after a disturbance. So the stability of the shoe can signify its capacity to limit involuntary imbalances of the foot and of the ankle. Here, kinetics data (Fx, Fy and Fz for each foot) have been extracted during locomotion in different conditions (shod and barefoot conditions). Currently, stability is evaluated with 2D or 3D film analysis, or with the study of center of pressure path. This paper determines if another biomechanical parameter could be used to quantify the stability.