 At 8 weeks, the patient will again be record in the AlterG body weight supported treadmill. The patient will get prepared to use the body weight supported treadmill. The patient will wear the appropriate shorts associated with the treadmill based on waist size. 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 enter the AlterG body weight supported treadmill. After the treadmill calibrates, they will begin the first walk-jog progression. The following setting will be used for the first run based on standard protocol. 