According to Rational Emotive Behaviour Therapy (REBT), humans have a strong biological tendency to adopt self-defeating irrational beliefs which are subsequently driven by the socio-cultural environment one lives in (Ellis, 1976). Sport of all levels presents a unique environment which may serve to explain sport-related irrationalities harboured by athletes given that sport seems to endorse irrationality evident by the language used by key personnel and outlets (e.g., coaches and the media; Turner 2016). An athlete’s beliefs and philosophies are shaped by a myriad of people within and outside of sport with whom they look to for guidance, such as coaches, medical professionals, parents, and the media. These key social agents within an athle...