[wes]

Trux,

I agree also with what you are stating on the benefits of having CO2 for a static apnea or a FRC dive. Seems like the "crazy tables" that were referred to at 2007 Egypt were a way to keep high levels of C02 while still keeping 02 levels up by gulping just a bit of air at a time while starting with a negative hold.

To summarize my point above, it is that if you do want or feel you need to do a purge breath before the last inhale then you don't need to take a huge full inhale and then exhale, you can simply take a deep belly inhale and full belly exhale while keeping the chest flat or deflated and this gives good gas exchange with less work and lower heart rate then full inhale and full exhale. Cheers Wes