Exercise has been suggested as an effective adjunctive treatment for a range of mental health conditions. In this study, we explored the perceptions of exercise held by course directors of doctoral training programmes in clinical psychology in England. Given the exploratory nature of the study, we used a qualitative design incorporating semi-structured interviews. Although most participants held favourable attitudes regarding exercise, this was related more to exercise being seen as a positive lifestyle activity that is worth encouraging, rather than exercise being recommended as an adjunctive treatment for mental health problems. Inductive analysis identified four themes that underpinned such a response: inconsistent positions on the evidential criteria used to evaluate the role of exercise, which masked themes regarding the perceived 'simplicity' of exercise interventions, a practical adherence to a mind-body dichotomy, and the incompatibility of exercise with traditional models of understanding and treating clinical conditions. The barriers we have highlighted will continue to hinder the consideration of exercise as a common therapeutic adjunct at present. Although further research is required to examine the relationship between exercise and mental health, consideration must also be given to how such research should be disseminated to mental health professionals.