Brent,
Thanks for your prayers too!
The PFT doesn't usually involve walking. It's an ABG, which is blood test from your artery (painful if not done by a skillfull tech) then they plug your nose and have your blow into a tube. They just have you blow in different ways for long and short periods. I usually cough alot and get really dizzy. It isn't bad it just wears me out.

Good luck! Trae~