Hypnosis has been used in various professions including dentistry, medicine, psychotherapy and sports, as a performance enhancement tool. Sports hypnosis incorporates cognitive and sports science methodologies. Hypnosis in sports therefore overlaps with areas such as biomechanics, nutrition, physiology and sports psychology.[3] Generally sports hypnosis is studied within the field of sports psychology, which examines the impact of psychological variables on athletes' performance.[4] While sports psychology began to be studied around the 1920s,[5] the study and use of hypnosis was not documented until the 1950s.[1] Members of the Russian Olympic team are said to have made use of hypnosis as a performance-enhancing tool around this time.[1]