This lecture provides an outline of the role that sedentary lifestyles play in the obesity epidemic. Teaching clients how to calculate their personal energy expenditure is an underutilized and necessary step to help them see what is needed to manage their own personal energy equation. Increased physical activity is widely agreed to be essential to successful long term weight management. Teaching clients how to incorporate short and multiple bouts of physical activity, use pedometers, increase everyday activities, and how to calculate price tags of food in steps result in increased physical activity and more successful weight management.