Physical activity - a necessary element in a healthy, sustainable lifestyle

http://www.who.int/bulletin/volumes/91/6/13-120790/en/index.html

"Since health-based models have failed to promote physical activity to the extent necessary, we must shift the argument from the finality or utility of physical activity (i.e. promoting health) to what a person experiences when physically active. Preliminary data suggests that the association between physical activity and psychological well-being, for example, is not dependent on the level of the physical activity but on what the person experiences during exercise and afterwards.¹¹ Under this new approach, regular exercise would be presented as a challenging and potentially interesting activity with the flexibility of being adaptable to a person’s circumstances (rather than vice versa). "