 At 12 weeks, the patient will again be recorded in a standard treadmill with no body weight support. At this time, reflective markers will be placed on anatomical position. These markers will later be used with the mechanics analysis software to determine running biomechanics. After the markers are in place, the patient will begin running on the treadmill per standard protocol. The following setting will be used for the first run on the standard treadmill based on standard protocol. 