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Anonymous
Think of your lungs as balloons. You can blow them up and get so much air into them. Now fill them halfway up with water. Now you can get much less air into them.
Cancer aside, that is what is happening to your lungs with every cig you smoke. True, the effect isn't significant on a per cig basis, but it adds up. With every one you smoke, you're losing out on another few grams of your VO2 max (methinks that's what it's called).
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