[Adolescent nutrition promotion: real and false problems].

This study shows the relationship between BMI of 3000 adolescents and their perceived-weight status, and the strategies for weight loss. The finding indicate that substantial numbers of teenage females perceive themselves as overweight when BMI suggest they are not, while males have a reasonably accurate weight. Diet was the most frequently selected method for losing weight especially among females that wrongly perceive themselves overweight (O.R. = 5.54 I.C. 95% 4.28-7.19); while males were as likely to use diet as a strategy to lose weight only if they were really overweight (O.R. = 6.00; I.C. 95% 2.26-15.92). Exercise was selected as a method for losing weight by males independently to be overweight and by females only that perceive themselves overweight. The study shows that the young people of Sardinia need a health program to empower their knowledge the difference between health and aesthetic.