Vampire Squid wrote:Hi everyone,
Am wondering...we all know that smoking doesn't improve air consumption (along with alcohol not improving air absorbtion) so someone who dives a healthy lifestyle enjoys their diving. What if someone continually dives with NITROX/ENRICHED AIR - do they improve their absorbtion/consumption more so

Do they improve their health overall
I'm reminded somewhat of a couple of "old school" British mountaineers who used to smoke like chimneys... they claimed that they could acclimitise better at altitude because they were used to not having the same levels of oxygen in their blood!!
I'm not sure that diving EANx will really make you feel better in life in general. I mean, if you did four dives of an hour each on a weekend... that's just under 2.5% of the total number of hours in a week that you'd be breathing elevated oxygen levels.
The body doesn't need a certain percentage of oxygen, but a partial pressure of oxygen. I can't remember the exact range of the top of my head, but it's something like we can cope with a range of ppO2 from about 0.16 to 0.4 ATM. So at sea level, that's breathing 16% to 40% O2.
Even when we dive with air, we increase the ppO2... so a 30m dive on air has a ppO2 of 4 (depth in ATM) times 0.21, or 0.84. That's nearly the same as breathing pure oxygen on the surface. Do you feel healthier and happier after a weekend of diving now?
A lot of people claim that they feel less fatigued after diving EANx than air, it's never been something that I've noticed - individual physiology and perceptions are all different, I guess.
diveChiq wrote:my air consumption is actually pretty bloody good. a deep dive to 26.4m for 30mins on a 190bar tank and i came up with 140 bar.
Any idea what the average depth was on that dive, T? If that was all spent at 26m, that's a bloody amazing consuption rate!