This is a fascinating one. It is all connected you know. Emotion, performance, appearance. Your posture and expression can be a window on your mental and physical state. It is not only that you feelings can affect your posture and your facial expression - you look dejected or unhappy - it seems that your expression can affect your feelings.....smiling makes things feel better. This was reported today - Smiling Facilitates Stress Recovery The results of the study suggest that smiling may actually influence our physical state: compared to participants who held neutral facial expressions, participants who were instructed to smile, and in particular those with Duchenne ( genuine ) smiles, had lower heart rate levels after recovery from the stressful activities. The participants who held chopsticks in a manner that forced them to smile, but were not explicitly told to smile as part of the training, also reported a smaller decrease in positive affect compared to ...