The purpose of this study is to investigate longitudinally, the walking ability of individuals with cerebral palsy who are transitioning into adulthood and to cross-sectionally examine the health status of these individuals in the context of their walking ability. Young adults who received instrumented gait analysis (IGA) as children will show significant decreases in overall gait performance, as measured by kinematics, kinetics, temporal-spatial parameters, and gait deviation index, compared to their last childhood IGA.