['To determine whether adolescents who participate in a weight-related sport are at increased risk for unhealthful weight-control behaviors and steroid use.', 'This was a population-based study (Project EAT [Eating Among Teens]).', 'Subjects were 4,746 adolescents (50.2% males, 49.8% females) from 31 public middle and high schools in the Minneapolis/St Paul area of Minnesota.', 'Descriptive statistics, chi2 analyses, and multiple logistic regression were used. Data were adjusted for sociodemographic variables and body mass index.', 'Unhealthful weight-control behaviors and steroid use.', 'More males (20.4%) than females (16.2%) reported participation in a weight-related sport. Males who reported participation in a weight-related sport had an increased risk of past-week vomiting (odds ratio [OR]=5.7), laxative use (OR=6.8), as well as past-year vomiting (OR=4.9), laxative use (OR=3.4), diuretic use (OR=6.0), and steroid use (OR=3.7), compared with those males who did not report participation. Females who reported participation in a weight-related sport had an increased risk of past week vomiting (OR=2.1), as well as past year vomiting (OR=2.0), laxative use (OR=2.6), and steroid use (OR=2.6), compared with those who did not report participation in a weight-related sport.'] Is participation in weight-related sports associated with higher use of unhealthful weight-control behaviors and steroid use?