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From what I understand, you can't change how much blood is oxygenated (ie lung efficiency). But you can change how much oxygen your body uses, through excersize.
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alveoli are air sacks on the very tips of your tertiary bronchioles. their health and capacity is directly related to their elasticity. increasing lung capacity isn’t getting a “lung muscle” stronger, it’s making your alveoli more elastic and able to stretch bigger
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