Here's another side to the breathing question. The LSC coach told me that Pete sometimes visualizes himself doing the active exercises. On a trip, for instance, he will visualize himself doing the exercises while he sits in an airplane, etc. If this works well, then the breathing and movements aren't so important and the visualizations must be very important!
I tried this on a recent short trip. I was very calm throughout the trip, even when my flight was delayed for an hour. I just sat in a corner, closed my eyes, and visualized myself doing qigong. At the end of my trip, I did find a quiet spot and actually do the Gathering Qi ending exercise.
I would definitely try this again on my next trip.
