The basis of what I do using hypnosis and NLP is to help people use their minds to influence their bodies - whether this is to influence behaviour, feelings, illness or mood. The great thing is that, whilst I see this working on a day to day basis, research into the sophisticated links between mind and body is revealing the extent of this fascinating connection.
I want to draw your attention to two recent examples. Firstly, in a popular Ted Talk form 2012, Amy Cuddy talks about how Body language affects how others see us, but it also changes how we see ourselves. Social psychologist Amy Cuddy shows how “power posing” — standing in a posture of confidence, even when we don’t feel confident — can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success. It's a useful 2 minute 'lifehack' and you can see the video here: https://www.ted.com/talks
Secondly, an article published in the Journal of Behaviour Therapy and Experimental Psychiatry shows that our mood can affect how we walk -- slump-shouldered if we're sad, bouncing along if we're happy. Interestingly the researchers have shown it works the other way too -- making people imitate a happy or sad way of walking actually affects their mood! You can see more about this article here: https://www.sciencedaily.com/
So, if you need to feel confident before that big meeting, or you just need to lify your mood, pay attention to how you are moving, adopt the stance or movement of how you want to feel and notice the change!