Gait‑related PT Intervention The treatments involved in the gait-related PT intervention are a standard part of PT practice and the skills do not need to be taught. However, the process for selecting what is done from the study menu (specified within each of the GMFCS Levels) and treatment restrictions were covered in a 3-h orientation session led by the Co-PI (VW). PTAs are rarely involved in this arm, and when they are, it is to provide physical assistance. Thus, extra training is not required.