This brief report tests the mediating effect of self-esteem in the relationship between body dissatisfaction and symptoms of depression and anxiety. A sample of 409 adolescents (females = 58.4%) aged between 14 and 18 years completed the Rosenberg Self-Esteem Scale, the Contour Drawing Rating Scale, the Multidimensional Anxiety Scale for Children, and the Center for Epidemiologic Studies Depression Scale. Overall, results for the indirect effects analysis were significant for both anxiety and depression, which confirmed the mediating role of self-esteem. Thus, a negative perception of one's body image has the effect of lowering self-esteem, which in turn increases psychological distress.

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This study tested a longitudinal motivation model for healthy eating in patients with cardiovascular disease, using self-determination and social-cognitive theories. A total of 513 patients completed measures of eating habits, global motivation, motivation for eating, self-efficacy for eating and life satisfaction, immediately after a major cardiac incident and at three times during a year (e.g. 2008-2009). Physiological indicators were measured to examine how they predicted the participants' physical health. Results found participants with self-determined motivation were more likely to develop a sense of self-efficacy towards eating and a healthy diet, which had beneficial effects on their physical health and life satisfaction.

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