This study involves two groups of participants: one participating in an intervention focused on self-esteem-and thus primarily psychological-and the other on self-esteem and tennis-and thus involving physical activity. The objectives of this study are to document participants' experiences following their participation in the group offered to them, as well as to quantify any changes in the various areas detailed below. In this study, we aim to identify the benefits gained following a group intervention in the social, academic/professional, clinical, and physical domains; we also seek to objectively assess any changes in cognition, self-esteem, perceived physical value, quality of life, social functioning, negative symptoms, and self-stigmatization.