First, the 6MWT will be administered with the participant wearing the first randomized AFO. Participants will be asked to ambulate as far as possible in 6 minutes at a self-selected walking velocity through a well-lit indoor corridor. A five minute seated resting will be provided. Next, gait symmetry and gait velocity measurements will be obtained using the GAITRite system. Participants will be given a practice trial walk prior to beginning of the testing. Participants will be asked to walk at their comfortable self-selected walking velocity along the walkway. They will begin walking three meters from the start of the walkway and will stop walking two meters past the end of the walkway. The beginning and end of the walking area will be marked with red tape for visibility. The verbal instruction will be "Please walk from this red line to that red line at your comfortable speed safely". A second personnel will be walking close to the participant outside of the walkway to ensure safety. After a five minute sitting break, participant will be asked to walk as fast as they can safely. The verbal instruction will be "Please walk from this red line to that red line as fast as you can safely". The GAITRite system will be able to capture both gait symmetry and gait velocity measurements with the same walk. Three trials will be performed of the self-selected velocity walk and fast paced velocity walk. The calculated mean of the three trials will be used for data analysis. After a 10 minute seated rest break, the second AFO condition will be used and measurements will be repeated in the same order described above.