Most stutterers do not breathe with consistent airflow. The tension and haltering airflow through the vocal cords creates the stuttering. This is what I found to be true. If you have a stuttering brain then the brain wants you to stutter. It does not understand fluency. The brain will always go back to its comfort level which is stuttering. What I did was teach my brain how to be fluent. My brain fought me constantly because it wanted to stutter. Once the brain understood the concept of fluency and learned how to breathe for speech, I became fluent.