During the past 100 years, America has changed from an agrarian society, where the intent of physical activity was to produce needed materials, to a postindustrial society, where 60% of American adults are not regularly physically active and 25% are not active at all. With sedentary lifestyle and its attendant consequences on the rise, the occupational health nurse can increase individuals' knowledge, facilitate their decision making, and motivate them to try new behaviors and change existing behaviors. The occupational health nurse can use a model to organize individual workers' information and clarify strategies to promote behavior change. The goal is to decrease the morbidity and mortality associated with sedentary lifestyles of American workers by using the model when individuals present to the occupational health service. Individuals benefit from health care professionals who understand personal risks and communicate strategies to address barriers and concerns when they consider behavior changes such as increasing physical activity.