I have often noticed people talking of pursed lips breathing,and practice that myself,finding it helpful.But I have never seen PROLONGED EXPIRATION recommended,has it gone out of favour?
I believe the the aim of it, is to reduce air trapping into the lungs,To practice....
Breathe out slowly over count of 3 through pursed lips,then breathe in through nose,during count of 2.
MOST IMPORTANT THAT BREATHING OUT TAKES LONGER THAN BREATHING IN,AND IS NOT FORCED.
Breathe easy, Wendells xx