How does OPIS quantify support levels in shoes?
OPIS machinery is specifically designed to mimic the rotational and compressive forces of the human foot. As each shoe is loaded for testing, specific forces are applied, and a series of measurements are taken to determine the torsional support of the shoe (TCI), the vertical support of the shoe (VCI), and the energy return (RI). The variables indicating shoe support levels, TCI and VCI, can be used independently to compare shoe models, as well as jointly to provide a measurement of overall shoe support, in the Shoe Stability Index (see below). For more information on the testing process, please visit OPIS at Work.
