One technique Leonard taught is called 20 connected breaths.
It is four breaths into the upper chest and one long one all the way down to the abdomen, repeated four times to make 20. I used it from time to time, and it is highly energising.
I heard this technique was used in meetings at Rebirth International when people expressed reactivity. We also use it at the start of online International Breathwork Foundation IBF workgroup meetings. I think Yogi Babaji gave it to Leonard.
