Purpose. The purpose of this study was to examine the association between parental patterns of physical activity (PA) from adolescence to young adulthood and parental beliefs for child PA.;Methods. Of 231 eligible participants, 108 completed a questionnaire (72% female, 27% minority, 29.5 +/- 1.2 years) assessing their importance and encouragement beliefs for child PA. Importance and encouragement belief scores were summed to yield two scores, each from 7-35. PA was measured using the same questionnaire during adolescence and young adulthood to yield a summary score in hours per week of PA. Spearman correlations, univariate, and multivariate analyses were used to examine beliefs across categories of PA.;Results. Spearman correlations revealed weak, positive associations between beliefs and PA for both genders. After adjusting for appropriate covariates, moderate levels of adolescent PA were positively associated with encouragement beliefs in males (p=0.02), and moderate levels of young adult PA was positively associated with encouragement beliefs in females (p=0.04). Multivariate analyses also showed that females with persistently moderate levels of PA from adolescence to young adulthood had higher encouragement beliefs than females with persistently low levels of PA (p=0.04). No significant differences were found for importance beliefs.;Conclusions. Overall, moderate levels of PA appear to be positively associated with encouragement for child PA. The association was moderated by parent gender and PA behavior. These results add an important element to previous research that has examined the link between parental encouragement and child PA, and may be useful for interventions that focus on improving parental encouragement for child PA.