1 Department of Management, John Molson School of Business, Concordia University, Montreal, Quebec, Canada. thecht@jmsb.concordia.ca

Employees today are involved in many different types of activities outside of work, including family, volunteering, leisure, and so on. The purpose of this study was to understand how participation in such nonwork activities can both enrich and interfere with well-being and behavior at work. Four dimensions of nonwork-to-work spillover were examined to better understand this process (i.e., positive emotional, negative emotional, positive behavioral, and negative behavioral). Survey data were collected in 2 waves from 293 staff and faculty members of a large Canadian university (N = 108 matched surveys from both waves). We found that volunteering is associated with increased well-being and work satisfaction, and that it creates positive emotional and behavioral, and negative behavioral spillovers. We also found that sports, recreation, and fitness are associated with improved well-being and positive emotional spillover. Negative spillover is associated with negative outcomes.