@jnmy by “coaching” I mean during the PFT itself, by the respiratory therapist. My first ever PFT was after my MAI diagnosis. The tech sat at his computer and gave verbal instruction but I found the whole process very confusing and disorienting. Afterwards I told my spouse they should give us one practice run through first just so we know what we are doing before they “test”. I then went to pulmonary rehab. There, the therapists taught us that good coaching during a PFT can make a lot of difference in the PFT’s results. This was just an abstract comment until I went for my second PFT. This second therapist was fantastic, very animated, standing before me “blow, blow, blow!!! … now DEEP INHALE!” … etc. she really brought the instruction to life and pushed/pulled me through the test with verbal and visual cues. What a difference. I am having another PFT soon and have requested the same fantastic therapist. Fingers crossed I get her!