Last week I saw a video of a therapist reviewing and teaching a type of breath-work that involved a person pushing breath out strongly by pinching in their abdominal muscles. The instructions also involved acting as if one is blowing out a candle that is about arms length away. She suggested to re-seed one’s breath and reset an upset system by attempting to blow out this imaginary candle about 10 times, before your body may allow you to move into deeper, intentional breathing. It was a good video, but I should have noted its location (URL) at the time.
However, this simple list from “The Utopian Life” also appears to be quite good. If you have success with it, feel free to email me with what you notice. (I’m getting no payment for mentioning them. Check out their site if you wish).