Both life-planning and the adoption of lifestyle options become (in principle) integrated with bodily regimes. It would be quite short-sighted to see this phenomenon only in terms of changing ideals of bodily appearance (such as slimness or youthfulness), or as solely brought about by the commodifying influence of advertising. We become responsible for the design of our own bodies, and in a certain sense noted above are forced to do so the more post-traditional the social contexts in which we move.
Anthony Giddens (2013). “Modernity and Self-Identity: Self and Society in the Late Modern Age”, p.107, John Wiley & Sons