Abstract: A dynamic balance sport performance system is provided for the dynamic testing of an individual so as to be able to provide appropriately configured shims to be placed adjacent the individual's foot in a shoe for the purpose enabling the individual to perform better in whatever sport he/she is participating. In one embodiment, an automatic system is provided for simulating shim insertion in a shoe in which two footbeds spaced apart by a predetermined distance are provided with a quadrature arrangement of hinged shim plates which are individually adjustable to predetermined shim angles. After one of the individual plates has been set, with the individual seeking to maintain his/her elbow in a horizontal position, pressure is applied to the individual's elbow until such time as a load sensor senses a predetermined load indicating that a predetermined pressure has been applied to the elbow of the individual.