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A member asked:
If something is wrong with my lung or lungs will my oxygen generally be low?
A doctor has provided 1 answer
Not necessarily: Your lungs come with a lot of built-in reserve. That is, functionally they can do far more than you need to, unless you're running a triathlon for example. That said most lung diseases will not affect your oxygen levels until very far advanced.
Answered 4/15/2013
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