There is some evidence that when people take on this posture they do have the feeling so there is support for power posing in that sense. When you stand up straight thrust your chest out forward and what you're doing there is then giving yourself the kind of posture where your lungs start to actually give you more oxygen and therefore you feel a little bit smarter more alert and better about yourself. The advice I got when I first heard about public speaking when I was a teenager is stand up and clench your buttocks together and everybody laughs at it right that's idiotic why do you do that? It has nothing to do with your buttocks but if you do clenchyour buttocks together that forces you to