Inhale and exhale rapidly through your nose, keeping your mouth closed but relaxed.
Your breaths in and out should be equal in duration, but as short as possible. This is a noisy breathing exercise.
Try for three in-and three-out breath cycles per second.
This produces a quick movement of the diaphragm.
Breathe normally after each cycle.
Do not do for more than 15 seconds on your first try.
Each time you practice the Stimulating Breath, you can increase your time by five seconds or so, until you reach a full minute.
