Despite widespread awareness of benefits of the physically active lifestyle, rates of inactivity remain high. Increasing physical activity (PA) is the public health priority in most developed and some developing countries. In an attempt to reduce current rates of inactivity, many behavioural modification programs have been developed, and evaluated using the variety of theoretical and cognitive-behavioral techniques. Recently, researchers have focused upon innovative information technology applications such as Internet as the means of engaging populations, and individuals in health education, and health related behaviour change and , including . Internet -based programs have potential ...