 Rationale: Slipped Capital Femoral Epiphysis SCFE treated with one screw in situ fixation results in an altered gait. It is thought that the protraction of the pelvis at the affected side, seen in patients with unilateral stable SCFE, is a compensatory mechanism to reduce out-toeing and thereby improve foot positioning to restores the gait patterns towards a normal gait pattern. The goal of this study is to investigate this hypothesis since only a few studies are conducted evaluating gait in treated SCFE. It is also thought that this pathology results in an impaired balance. Computer Assisted Rehabilitation Environment CAREN will be used. 