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Why does Freediving Blackout happens?It very is all concerning physics and gas pressure within the lungs, thus here are the nuts and bolts. First, we have a tendency to all recognize we want oxygen (O2) to measure however the body uses our levels of carbon dioxide (CO2) to inform us when to breath.Most folks deplete our O2 stores quickly which in turn creates CO2 level in the body, this can often be very dangerous even for the most experienced divers who can hold their breath for extended periods of your time (at least more than us out-of-shape individuals).Second, the deeper you're within the water, the additional compressed the air in your lungs can become and also the additional focused the oxygen you're Cool North Face Denali Jacket Men Grey/Black outlet able to use.