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Methods: This study was performed on 535 male students in the 12-16 age range and resident of District 5 in Tehran. A Bioimpedance analyzer was used to measure the weight, BMI, body fat and muscle mass percentage. Moreover, the level of self-efficacy of the subjects was evaluated using Weight Efficacy Lifestyle Questionnaire (WEL).

Results: The results showed that there is no association between the level of self-efficacy and weight and BMI. With regard to the association between body composition and self-efficacy, the results identified a significant positive association between the level of self-efficacy and Skeletal muscle percentage)(P< 0.05).

Conclusions: The results of the present study represented that the level of self-efficacy in male adolescents was significantly associated with body composition; and people with higher self-efficacy have muscular body. Doing Further studies about the effect of self …