juliet great question
what i do know is a normal persons fev 1 ranges from 80 to 120.So someone who does a lot of exercise etc will be around 110 and over as compared to someone who is overweight unhealthy etc is very likely to be at the lower end of the normal range hence around 85.
I think from what the docters told me a while back when i poised them this same question was that lung function drops incredibly slowly in a normal person(who doesnt smoke) ie i cant give you a exact amount but from the information i gathered of the docter i doubt if over a normal persons lifespan their fev1 doesnt drop more than 10%
what i do know is a normal persons fev 1 ranges from 80 to 120.So someone who does a lot of exercise etc will be around 110 and over as compared to someone who is overweight unhealthy etc is very likely to be at the lower end of the normal range hence around 85.
I think from what the docters told me a while back when i poised them this same question was that lung function drops incredibly slowly in a normal person(who doesnt smoke) ie i cant give you a exact amount but from the information i gathered of the docter i doubt if over a normal persons lifespan their fev1 doesnt drop more than 10%