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>>Is it due to more oxygen in the system allowing the body to be better
>>at clearing up as it goes the biochemical rubbish left by continuous
>>exertion and fuel-burning?

>I'm not sure - good point.  As I said in my original message, I don't
>think anyone knows the answer.

Leaving the obvious benefit of less N2 absorption for the minute...

The only benefit of higher O2 as I can see it is better perfusion of
tissues with O2.  When would this come into play???  Let's also assume
that tissue damage is not occuring (higher O2 perfusion would most
likely aid in tissue regeneration/healing/etc).  Well, does it keep
the muscle groups and others tissues from going into an anerobic
condition which would generate lactic acid?  If so, is the body able
to transport the CO2 in sufficient quantities (remember, CO2 is
carried by the blood too)?  Personally I suspect that CO2 transport
will not be the limiting factor here since even under normal
circumstances 70% of the CO2 is carried as HCO3- (Carbonic Acid).
This is what changes the blood pH and stimulates the breathing
response.  As far as waste removal, I see no benefit in this arena
addressed by higher PPO2 or more O2 in the system.

Remember, O2 is one of the fuels, it is NOT the garbage pickup truck.

Finally, a discussion without a flame - but of course I would guess
that Richard was involved :^)

-Carl-

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