Very probably the wrong place to post this but I'm new thus immune to any and all accusations of wrongdoing whatsoever. With that said:
Do you think (or even know) that behavioral/psychological changes affect physiology? To what degree? For example, 'power posing' can change testosterone and cortisol levels (spread your body out and the former goes up whilst the latter goes down). But can the decision to 'be selfish' also increase testosterone given than people with high testosterone tend to be more selfish...
I muse on this because I remember that prior to gaining 30 pounds of muscle and the strength to match, I read an article (on T-Nation funnily enough) that recommended that one 'become arrogant' prior to engaging in such a challenge. It worked a charm.
Any thoughts or similar experiences?