Physical activity and health.

Physical activity is an important determinant of both physical and psychological health. Regular physical activity exerts beneficial effects on onset and progression of a number chronic diseases, well-being, and has positive effect to communities and societies. Unfortunately, more than 60% of world-wide adults do not reach the recommended levels of physical activity. This paper presents the prevalence, health risks, and economic costs of physical inactivity. It also reports the substantial physical and psychological health benefits of regular physical activity.