I found a chart with the height multipliers.
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<br>http://braintalkcommunities.org/forums/archive/index.php/t-8432.html
<br><br>That link no longer works, here is a new one:<br><br>http://www.hopkinsmedicine.org/pftlab/predeqns.html<br>
<br>The raw numbers are adjusted for age and height--because a tall person has bigger lungs than a short person. That said, natural organ-size variation and torso size play a role too.
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<br>Radiologists have consistently told me I have long lungs for my height and I have a long torso in general. So the first fev1 I remember from 13 years ago, I was a month out of a lower lobe pneumonia and my score was in the 130s. Now I hover between 99 and 103%. I wouldn't be surprised if my FEV1 would be more accurately calculated using the multiplier for a person 5'6"-5'7" rather than 5'4" to 5'5", but the most important thing anyway is the trend an individual has over time.
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<br>As for exercise, I was a sports freak as a kid and my dad, whose body I have the girl-version of, was a marathon runner for several decades. Exercise probably contributed to the lung function and the lung function led me to enjoy exercise like soccer, swimming and track. I am sure it is a reinforcing process. In four yrs since I have been exercising a lot again, unfortunately my FEV1 has still dropped about 15 points. But who knows how much it would have dropped w/o the exercise. Plus, my resting heartrate is much lower and my lower lobes feel soupy fewer days a week.