During the past two decades, Saudi Arabia has witnessed a tremendous development and urbanization at astounding rate. The standard of living rises and mechanization has been apparent in all aspects of people’s life. And as industrialization and modernization progressed, substantial changes in physical activity patterns and eating habits are likely to have occurred. Indeed, physical inactivity and sedentary living with associated low level of physical fitness are increasingly becoming prevalent in the Saudi society. From the available published studies, it appears that most of Saudi children, adolescents, and more so adults do not meet the minimal weekly requirement of moderate to vigorous physical activity necessary for effectively functioning cardiorespiratory system. Evidences from daily heart rate telemetry indicate that the average Saudi boys spends less than 10 minutes a day in activities that promote cardiorespiratory fitness, and many children may never engage in any activity of moderate to high intensity level at all. Obese boys tend to be physically less active than lean boys. In addition, inactive children exhibit higher levels for most of coronary artery disease risk factors compared with active children. Moreover