Breathing is a reflex, in the same way as circulation and digestion, which adjusts itself to our demand of energy. It is not possible to control it. Every vertebrate has a head and spine, and upon this basic structure is built every mechanism of our vital functions. If our spine is compromised, breathing and digestion will be interfered with as a consequence.
The Alexander technique is an ongoing process of bringing about the best possible mechanical conditions in our organism. As a consequence, vital automatic activities such as breathing and digestion can work to a higher standard, and voluntary activities such as moving, talking, singing or blowing can be performed more fluently. Hence it could be said that the AT is a way to improve our conditions for whatever we do. The way it works is, first by avoiding any habitual reaction, prioritising the freedom of the head/spine, and once that is happening give consent to what we want to do. Giving that consent may bring about some fixation or interference, but this is not necessarily bad: having previously put ourselves in the best possible conditions, that interference is now easier to observe and thus we can learn more clearly what it is that we need to prevent. This is the most exciting part of learning a discipline. It switches the idea of improving our conditions for a better performance into performing as a means of observing ourselves, the latter being a never-ending and rewarding journey.