It is important for Americans to prevent weight gain and to lose weight if they are overweight or obese in order to prevent chronic disease and reduce the chance or mortality. Essentially all weight loss programs recommend increasing physical activity and improving the quality of the diet to accomplish these goals. Because a drastic change in lifestyle is sometimes hard to sustain, it is recommended for people to incorporate 10-15 min of activity a few times a day (during lunch, before or after work) in order to reach their activity goals.