Stage Fright Symptoms

As stage fright symptoms of my body I would highlight hunched, twisted back and wrong breathing.

• when I'm speaking in public , especially in a foreign language, my back is often haunched. As I can see from the text it happens because our body, ready to defend itself from some attack,  becomes curved, takes the biological position of the embryo. 
• Also while I'm performing in public I always notice that I breath in a wrong way. I feel that to the end of a few lines I don't have air to breath, so I need to breath in in order not to suffocate. So I should make pauses between ideas I express to breath in and breath out so that my breathing is calm and convenient to speak smoothly. I can explain this phenomenon as in the process of speaking my focus is on my performing, on the text and so on regarding speech, so I focus on the most important thing that moment and just forget all other thing including even breathing.