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For more information regarding PNF in general go to IPNFA - from facilitation to participation - Introduction
the world organisation for PNF.
I have used trunk patterns in treating all sorts of patients but do not know of a specific technique to treat lung problems. These patterns can help mobilise the thorax and strengthen all kinds of related muscles. But I never learn specific Chest PNF and do not even know if it exists.

Maybe another member of the association can help you out.

good luck
Esther