The aim of the study was to examine the differences in body image and eating behavior of youngsters regarding exercise and sex. Self-worth and consumer behavior were examined, too. 160 teenagers between 13 and 18 years participated in the research. Girls differed from boys in body experience. The results of this study revealed that girls were more likely to pay attention to their bodies than boys. In addition, they were more dissatisfied with their bodies, had a stronger feeling of body alienation and less trust in their self presentation. Yet, the study did not reveal more body dissatisfaction in more sportive teenagers than in less sportive teenagers. Meaningful differences in sex could be found in eating behavior. The cognitive control of eating behavior as well as disinhibiton was higher in girls than in boys. Contrary to other studies, exercise hade no impact on eating behavior. Furthermore, there was no indication, that sex and exercise may have an influence on self-esteem. The study found, that boys drink more alcohol, while girls take more pills. Sport didn?t have an influence on consumer behavior. Overall the study found, that sport had seemingly no effect on the variables, while differences in sex and relationships between body image, eating behavior, self-esteem and consumer behavior did exist.