Background: Multiple role theory has proven effective in predicting variations in health, and a growing body of research has shown the importance of taking women's roles into account when analyzing physical activity levels. Nonetheless, researchers have yet to characterize the interaction between the various roles played by women and their physical activity.

Purpose: The objectives of this study were to elucidate the relationship between multiple roles and leisure-time physical activities (LTPAs) and to determine whether LTPA varies among women across different roles.

Methods: Data were derived from the 2013 National Health Interview Survey database provided by the Health Promotion Administration of Taiwan's Ministry of Health and Welfare, which includes 5,147 working-age women. The current study focused on women aged20–50 years. The roles considered in this study included living with a partner, living with children, and employment status. LTPA levels were categorized as regular, inactive, or insufficient based on the LTPA metabolic equivalent in the previous week. The associations among level of LTPA, multiple roles, and demographic characteristics were analyzed using multiple regression analysis.

Results: We found single mothers with children to be more inactive than partnered mothers, and women living with a partner and those living with children were more likely to be inactive, whereas women working full-time were not at risk of inactivity. Women who assumed a larger number of roles were at a greater risk of inactivity. These findings are consistent with role strain theory.

Conclusions: Single mothers with children are more inactive than partnered mothers, and appropriate social support programs are necessary to reduce further disparities. Second, multiple demands on working-age women limit the time available for LTPAs, particularly among women living with a partner and children and engaged in full-time work. A physical activity intervention is a program or initiative designed to promote physical activity and improve health outcomes. We should develop and provide sustainable physical activity resources through the help of partners' housework to better promote physical activity intervention for working-age women.