I am a vocalist and have breathed through my diaphragm since age 8 or 9...it's my natural breathing pattern after almost 20 years.

This past year, the TOS has flared so badly (I assume that's what's going on) that my lungs are being strained. I am naturally reverting to lung breathing!

It's been very difficult to force myself to breathe through the diaphragm at all. Almost like I'm having to retrain myself due to my body's new format. It's worth it, though.