How would you release muscle tension by our vocal area?

How would you release muscle tension by our vocal area? This is a hypothetical but if it were the case then what would you do? Say we are very vulnerable to muscle tension. For a non-stutterer, the threshold would be very high but still humanly attainable because I think when they refer to "choking" when they are overwhelmed by fear/anxiety when talking (maybe first comedy night or 1st giant audience, etc), they are referring to the same thing we go through at a much lower threshold for ourselves, otherwise why would any fear/anxiety ever block them from being able to talk? So if something hasn't properly developed in us to the point where our speech process is so sensitive to minor disturbances in tension (like just the thought of stuttering gives a quick flair up of muscle tension that then effects our speech), or being able to say something at home, in the shower, but not able to say that same thing in other situations among people, then wouldn't trying to push/lean through the tension in essence just compound the tension? If this were so then how would you go about releasing the tension to free the speech motor functions to be able to talk without such interference from muscle tension in that area?