 Patients referred to a specialist patellofemoral clinic with an unstable kneecaps will be approached by the student and asked whether they would be interested in participating in the study study group. Participants will be considered eligible for the study group if they have had two or more episodes of kneecap dislocation or many episodes of instability with at least one of the following: a feeling that the kneecap will dislocate with pressure, tenderness along the inner side of the knee andor abnormal movement or position of the kneecap. 