This project tests the cost-effectiveness of two promising evidence-based health promotion/ behavior change interventions. The first intervention is the COACH Program, a revised version of the Health Enhancement Program (HEP) that has been implemented to date with older adults at multiple Senior Centers across the country (Leveille et al, 1998). The second is the web-based RealAge program which is also being implemented for older adults at multiple sites nationally and internationally. The Coach program combines a web-based risk assessment with individualized counselling. In contrast, RealAge is a totally web-based program.