Ok so went to asthma doctor and was told i have 60% lung expansion. They gave me some medicine but i want to do more. Is there any herbs or foods that help increase the lungs. I already run and for some reason even with the limited function i can still get a 8 minuite mile down with minimal difficulty. I told my doc that and he cant explain it either. Its like i can breath better when i workout. Im also wondering if thats even normal?