I might be biased, but I do believe that the best sport psychology candidates are those who have partaken in an elite sport or performance domain (like competitive dance or professional music). I am a firm believer in the sport psychology consultant using their as-lived, phenomenological experience from their own sporting experience to really relate to and provide hands-on tools to the athlete. Kind of like a ‘been-there-done-that’ phenomenon: the consultant has already been there themselves, so they have a better understanding of what tool will make the difference with the athlete/high performer. This is not to say that you have to have been an elite athlete/performer to be an expert sport psychologist, I just happen to think those that have competed in an elite sport or its equivalent have a leg up.
In 1974, Theodore X. Barber and his colleagues published a review of the research which argued, following the earlier social psychology of Theodore R. Sarbin, that hypnotism was better understood not as a "special state" but as the result of normal psychological variables, such as active imagination, expectation, appropriate attitudes, and motivation. Barber introduced the term "cognitive-behavioral" to describe the nonstate theory of hypnotism, and discussed its application to behavior therapy.