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Orthorexia nervosa in a sample of Portuguese fitness participants

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Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity Aims and scope Submit manuscript



Orthorexia Nervosa (ON) is described as an obsessive behaviour motivated by great concern for following a healthy diet. Although it was first described in 1997, ON remains inconspicuous and poorly characterized in the literature. The aims of this study were to evaluate the prevalence of ON in a sample of ambulatory individuals and to investigate their common characteristics, attempting to better characterize this entity.


A non-random sample of 193 adult gym members answered a questionnaire based on a Portuguese version of ORTO-15, supplemented with additional questions. Possible associations between the different variables and pathological scores on ORTO-15 were analysed using logistic regression models.


ON behaviour was documented in 51.8% of the sample, mean age 30.96 years (± 1.03 years), and this condition tended to be correlated with younger ages. Physical appearance and frequent exercising were also associated with ON, while no correlation between orthorexic tendencies and both gender and educational field was found. Furthermore, consumption of special food, dissatisfaction with physical appearance and frequent exercising could predict the presence of ON in the sample.


Despite the use of a convenience sample, results place us in a different perspective, considering the idea that orthorexic individuals are exclusively concerned about pursuing a pure diet. The presence of ON was associated with other non-dietary behaviours allied to a healthy lifestyle and aesthetic concerns.

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Level V: Descriptive study.

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We thank Emília Nogueira, Ph.D and Esmeralda Gonçalves, Ph.D for the statistical component of this study.

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Correspondence to Carolina Almeida.

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The authors declare that they have no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.

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Informed consent was obtained from all individual participants included in the study.

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This article is part of topical collection on Orthorexia Nervosa.

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Almeida, C., Vieira Borba, V. & Santos, L. Orthorexia nervosa in a sample of Portuguese fitness participants. Eat Weight Disord 23, 443–451 (2018).

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