Breathig techniques

[Guest guest]

Is anyone familiar with Buteyko breathing? It seems that this school of

thought suggests we 'overbreathe'and that if we don't retain enough carbon

dioxide there is not the correct ratio of gaseous exchange and in fact we

thus deprive ourselves of oxygen. I have a friend who has had terrific

results i.e. not using a 'puffer' for the first time in years and losing a

stack of weight. My basic question is this: does this conflict with yoga

breathing techniques, that is, are they essentially deep breathing

techniques, thanks, any input welcome and best wishes for the festive

season, Julie