Now that I have recovered from embouchure dystonia I can look back and reflect on what caused it. I believe that decades of playing with insufficient air flow contributed to the problem. This reduced air flow was caused by a misunderstanding of how breathing works and an insistent adherence to some traditional, yet flawed, breathing mantras.
Mantras such as “breathe low”…meaning that to breathe well, one must push out the abdomen, where the bellybutton is. To be clear: there is most certainly abdominal expansion when we breathe, but the abdominal expansion is not what causes air to come into the body. The abdominal expansion is the natural result of the diaphragm’s descent. As the diaphragm contracts (upon INHALATION), it pushes down on the contents of the abdominal cavity (the internal organs). The contents of the abdominal cavity move out in every direction (and down) as the natural result of the diaphragm’s descent.
The abdominal expansion should be allowed to happen – not made to happen.
Those who try to MAKE abdominal expansion happen create tension in the body and (ironically) reduce the air flow. I did this for many years and I believe the reduced air flow made the muscles of my embouchure work harder, thereby contributing to the development of dystonia.