That's in part because there isn't enough data. While some studies have shown positive results, they differ too much for anyone to draw a solid conclusion. Few studies that have been done over the years met HHS’s inclusion criteria, owing in part to the vast array of methodologies used. “There was no common or standard intervention technique to analyze,” the guidelines read. “Moreover, an independent review of nine hypnotherapy trials by the Cochrane Group found insufficient evidence to support hypnosis as a treatment for smoking cessation.”

Republic of Ireland: There are few graduate and no undergraduate programmes in Ireland offering specialised degrees in sports psychology. However, psychology is one of the professions listed for statutory registration with the relevant registration board of the Health and Social Care Professionals Council. The title of the profession is protected by law and can only be used by registered practitioners.
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Social conditions such as poverty, social isolation and inability to get or prepare preferred foods can cause unintentional weight loss, and this may be particularly common in older people.[42] Nutrient intake can also be affected by culture, family and belief systems.[27] Ill-fitting dentures and other dental or oral health problems can also affect adequacy of nutrition.[27]

The first use of the term "coach" in connection with an instructor or trainer arose around 1830 in Oxford University slang for a tutor who "carried" a student through an exam.[4] The word "coaching" thus identified a process used to transport people from where they are to where they want to be. The first use of the term in relation to sports came in 1861.[4] Historically the development of coaching has been influenced by many fields of activity, including adult education, the Human Potential Movement, large-group awareness training (LGAT) groups such as "est", leadership studies, personal development, and psychology.[5][6]
Motivation: A major subject within sports psychology, the study of motivation looks at both extrinsic and intrinsic motivators. Extrinsic motivators are external rewards, such as trophies, money, medals or social recognition. Intrinsic motivators arise from within, such as a personal desire to win or the sense of pride that comes from performing a skill.
It is used for a wide variety of applications, and studies into its efficacy are often of poor quality[2] which makes it difficult to determine efficacy. Several recent meta-analyses and systematic reviews of the literature on various conditions have concluded that the efficacy of hypnotherapy is "not verified",[3] that there is no evidence[4][5] or insufficient evidence[6][7] for efficacy.