“Putting off a health behavior like exercise is also made easier by fantasies about the benefits. This is known as a fantasy effect. That is, fantasizing about the benefits of exercise (you know, things like, “I really will get in good shape. It will be easier to do things, I will look better in my clothes, I won’t have the health problems my brother-in-law has, and my abs will look like Brad Pitt’s in Troy”) can reduce the motivation for exercise. It is as if the fantasy is satisfying enough in its own right, so our inclination to actually do the work is reduced. In contrast, accurate planning about the steps needed to reach good health is linked to following through with activities.”
― Michael W. Otto