Why is it more difficult to hold your breath after exhaling? Isn’t exhalting just getting rid of CO2 and isnt most of the oxygen absorbed by our lungs withing seconds after inhaling?
In: Biology
No. You only take like 10-20% of oxygen out of the air.
Otherwise mouth to mouth rescue breathing would not work.
It actually takes time to pull the oxygen out of the air you breathe in. That time is a bit longer than we tend to normally hold a breath. Our bodies don’t care, because normally our normal breaths are “good enough” and supply enough Oxygen.
So when you take a deep breath and hold it, you give your lungs more time with that air so they can pull more oxygen out of it. If you let all that air out and hold it, you’re going to be stuck with whatever was in your blood before you exhaled.
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