Man of Honour
- Joined
- 5 Jun 2003
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- 91,810
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- Falling...
Panic sets in and your heart rate and oxygen utilisation goes up.
Bit of a debate about that as one lung full of air is at ambient pressure, so your PPo2 intake should in theory be the same as if sat on the boat holding your breath.
HOWEVER, whilst you hold your breath, you are not flushing the nitrogen out at all.
My mate who runs iron mans and marathons can only hold it for 2 minutes sitting still so I'm sorry but there's a lot of BS'ing going on.