The maturation processes of applied sport psychologists have received little research attention despite trainees and practitioners having often reported experiencing challenging circumstances when working with clients. Within clinical psychology literature the self-practice of cognitive techniques, alongside self-reflection, has been advocated as a means of addressing such circumstances, and as a significant source of experiential learning. The present study sought to identify the possible types of, and purposes for, self-practice among twelve UK-based sport psychology practitioners. Thematic analysis of semistructured interviews indicated all participants engaged in self-practice for reasons such as managing the self, enhancing understanding of intervention, and legitimising intervention. Some participants also described limitations to self-practice. Subsequently, three overriding themes emerged from analysis: a) the professional practice swamp, b) approaches to, and purposes for, self-practice, and, c) limitations of self-practice. It is concluded that self-practice may provide a means of better understanding self-as-person and self-as-practitioner, and the interplay between both, and is recommended as part of on-going practitioner maturation.