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Objectives: to identify the body image perception i n c h i l d re n a n d a d o l e s c e n t s f ro m d i f f e re n t s o c i oeconomic backgrounds. Methods: a cross-cutting study was carried out in t h e c i t y o f F l o r i a n ó p o l i s , i n t h e St a t e o f S a n t a Catarina, Brazil, in the year 2006. Four hundred and t w o s c h o o l c h i l d re n , w i t h a n a v e r a g e a g e o f 11 . 3 5 ± 1 . 9 8 y e a r s , e n ro l l e d i n t h e f i n a l y e a r s o f p r i m a r y school were investigated. Body image perception was identified using the Stunkard silhouettes protocol and s o c i o -e c o n o m i c s t a t u s w a s e v a l u a t e d u s i n g t h e criteria proposed by the National Pres and Research A s s o c i a t i o n ( A N E P ) . P re v a l e n c e r a t i o s w e re c a l c ulated for dissatisfaction arising from perceived excessive weight or excessive thinness. R e s u l t s : a m o n g m a l e s , s i l h o u e t t e 3 w a s t h e o n e m o s t o f t e n c h o s e n a m o n g t h o s e f ro m t h e u p p e r a n d m i d d l e c l a s s e s , w h e re a s t h o s e o f l o w e r s o c i oe c o n o m i c s t a t u s o p t e d f o r s i l h o u e t t e 4 ; m i d d l e a n d upper class girls, however, opted for silhouette 2 was c h o s e n a n d g i r l s f ro m l e s s p r i v i l e g e d b a c k g ro u n d s tended to select silhouette 3 as best representing their o w n s i l h o u e t t e . S i l h o u e t t e 3 f o r m a l e s a n d 2 f o r f e m a l e s a re c o n s i d e re d t o b e t h e i d e a l f o r m o s t s c h o o l -a g e c h i l d re n . L e s s p r i v i l e g e d y o u n g p e o p l e h a d a h i g h e r p re v a l e n c e o f d i s s a t i s f a c t i o n a r i s i n gfrom excess weight than more privileged ones. Conclusions: there was a tendency to children of a higher social status to be dissatisfied because they re g a rd e d t h e m s e l v e s a s b e i n g t o o t h i n a n d f o r c h i ldren of lower social status to be dissatisfied because they perceived themselves to be overweight. Key words Body image, Socioeconomic factors, Perception, Child, Adolescent Resumo O b j e t i v o s : i d e n t i f i c a r a p e rc e p ç ã o d a i m a g e m c o r p o r a l e m d i f e re n t e s n í v e i s s o c i o e c o n ô m i c o s d e crianças e adolescentes. M é t o d o s : e s t u d o t r a n s v e r s a l re a l i z a d o n o município de Florianópolis, Santa Catarina, no ano de 2006. Quatrocentos e dois escolares, com média de idade de 11,35 ± 1,98 anos, matriculados nas séries finais do ensino fundamental, foram investigados. A p e rc e p ç ã o d a i m a g e m c o r p o r a l f o i i d e n t i f i c a d a p o r meio do protocolo de silhuetas de Stunkard e o nível s o c i o e c o n ô m i c o p e l o s c r i t é r i o s p ro p o s t o s p e l a A s s o c i a ç ã o N a c i o n a l d e E m p re s a s e P e s q u i s a ( A N E P ) . F o r a m c a l c u l a d a s r a z õ e s d e p re v a l ê n c i a s p a r a i n s a t i s f a ç ã o p e l o e x c e s s o ...

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OBJECTIVES: to develop a questionnaire to measure factors associated with physical activity (PA) in adolescents and analyze its reliability and validity. METHODS: a total of 248 adolescents from 14 to 19 years old took part in this study. The factors associated with PA measured were: attitude, self-efficacy, social support of PA and perceived environment. Cronbach's alpha (α) and intraclass correlation coefficients (ICC) were used to test reliability, and exploratory factor analysis to evaluate validity. RESULTS: attitude was measured as a single factor (attitude: α=0.76, ICC=0.89); self-efficacy consisted of two factors: resources for PA (α=0.76, ICC=0.75) and social support and motives for engaging in PA (α=0.76, ICC=0.67); social support was measured as two factors: support for PA from friends (α=0.90, ICC=0.89) and support for PA from parents (α= 0.81, ICC=0.91); and the environment was measured as three factors: access to and attractiveness of places to engage in PA (α=0.69, ICC=0.82), security/safety when engaging in PA (α=0.73, ICC=0.67), and general infrastructure of the neighborhood (α=0.70, ICC=0.75). CONCLUSIONS: the questionnaire exhibited satisfactory validity and reliability and can be recommended for studies investigating adolescents.

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