Abstract

Studies of the familial association of physical activity and sedentary behavior have increased in recent years. However, there is a lack of studies that have objectively examined the correlates between parents, grandparents, and childrens' PA. Therefore, the purpose of this study was to measure PA using accelerometers to determine the extent to which PA and SB correlate among parents, grandparents, and children. A sample of 169 children between 11 and 14 years, 225 parents, and 52 grandparents were recruited for the current study. Accelerometers RM42 were used to determine PA levels of children, parents, and grandparents. Epoch length was 6 s. Mothers' moderate-to-vigorous PA was associated with children's MVPA of children's MVPA. In contrast, grandfathers' sedentary behavior was a significant predictor of children's sedentary behavior. The results of the current study suggest that parental involvement in PA, particularly by mothers, is important for children's PA and, accordingly, healthy outcomes.