Hi, I always get good advice from this website due to the amount of people suffering with lung problems, so I hope to get a bit more today please. Well unexpectedly this morning two nurses turn up at my door to do a lung check from my local surgery, yes I do know them from the past. So they check me over due to my housebound condition and peak flow gadget says I'm 22% lungs working. So with that reading am I supposed to feel fit, walking, running or just slow and tired all the time like I usually feel? Any advice welcome.