Health behaviors are the silent causes of mortality in “advanced economy” countries (Armitage, 2009). Khaw, Welch, Luben, Day, Warhead, and Bingham(2008) have found the decreasing mortality risk is related to increasing number of positive health behaviors. Among the positive health behaviors, physical activity (PA) has been considered as an effective factor that has a protective effect on a number of disease, such as stroke and breast cancer (Miles, 2007). While PA remains a public health problem in the most areas of the world, even though some global strategies on physical activity have been made (Miles, 2007). Thus, efficient measures should be taken. It is widely accepted that theory-based behavior change interventions are more effective
