Interesting article in the Economist, The Power of Posture: How you hold yourself affects how you view yourself’. Read the article online using link below:-
http://www.economist.com/node/17899714
Depressed and unhappy people are recognisable by their collapsed demeanour. Happy children are upright and bouncy. My actor pupils certainly know that high status characters or ‘authority’ figures have upright carriage whereas the low status characters or buffoons have rounded and shambling postures.