Patients will be evaluated only observationally without intervention

The GAITRite® system mat was positioned on the floor and connected to a laptop computer, with a 2 m acceleration/deceleration walkway at either end. Subjects were asked to walk at their typical speed to the designated end of the walkway.

The system consists of a 20 × 20-inch platform at ground level connected to a laptop computer. The balance plate detects body sway based on the pressure that the subject's feet apply to the plate surface. For testing, each subject stood for 10 seconds under 4 different testing conditions. The first two conditions were eyes open and eyes closed on the balance plate itself, defined as normal stability - eyes open (NSEO) and normal stability - eyes closed (NSEC). These were followed by the patient standing on a 4-inch thick foam rubber pad while on the balance plate. These were labeled as perturbed stability - eyes open (PSEO) and perturbed stability - eyes closed (PSEC). The primary measure assessed by the balance plate for each condition was maximum center of pressure excursion or COP (a distance measured in inches of the major axis of an ellipse calculated along the axis of maximum excursion).

The Foot Posture Index - 6 (FPI-6) was evaluated with each child standing and using the original protocol. FPI-6 values ranged from -2 to +2 for each of the six criteria and from -12 to +12 for the total score, indicative of position of each foot along the supinated to pronated continuum of foot posture.