Quote:
Originally posted by fatdaddy411
About not holding your breath so you won't damage your lungs...couldn't you just pinch your nose and be in good shape? For at least those uh 10 seconds before serious injury develops.
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The air in your lungs would EXPAND! This is what causes injury to scuba diver. At deeper depths, the air in your lungs is at a higher pressure. If you ascend, and hold your breath, the air will expand at the lower pressures near sea level. BOOM.
If you don't hold your breath, and the air pressure equalizes, and the expanding air has somewhere to go.
If you do a very rapid ascent while scuba diving, you can pretty much be exhaling for the whole journey up.
Thats also why skin diving is safe. If you hold your breath and dive, you don't need to exhale, coz the original volume of air in your lungs at sea level remains the same. At depth, the air in your lungs just shrinks.