- Patients will be excluded from the study if they are a recent post-operative patient for lower extremity injury, have an additional acute injury to a lower extremity or back other than the foot or ankle injury being treated by the CAM walking boot at the time of initiation of treatment, have an ongoing or history of lower extremity joint injury, arthritis, or back pain or have restricted weightbearing as instructed by a physician (i.e. for ankle fracture that cannot weightbear).