“The inhalation should be extremely soft and continuous, whether sitting down or lying down. If you are walking or standing, you should be relaxed. What is forbidden is noise.”
The easiest thing you can do to instantly improve your breathing anytime, anywhere, is simply make it quiet. “What is forbidden is noise.”
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P.S. Remember our mantra way back from the 2nd edition of TB1%? Deeper, slower, quieter, and more regular.