I’m reading “The Alexander Technique for musicians”, by Judith Kleinman & Peter Buckoke.
It explains specifically how a musician can perform and yet, have a comfortable posture. One tip which I find interesting for everybody. is, in brief, our breathing speeds up when we are taken by our emotions. To change this, you can allow yourself to relax the abdomen and allow the ribs to open up freely. As the ribs are attached at the back they expand to the back as well as the side and in front. They also ask you to brighten your eyes, smile and whisper a Ah! of contentment. In this way, you can relax the tensions, drop your shoulders, balance your head forward and up to elongate the spine. You can extend your arms too, as I just did this to collect my thoughts!
There you are, just try and tell me (off or not!) Mic