I'm not chest beating. I'm illustrating differences in gas exchange
rates---this is the area we want more scientific study done on. This forumn
is responsible for driving the testing that will soon occur.

And actually, I try NOT to say heavy diver by itself, in a descriptive
phrase---I say obese AND sedentary. These are the two components that
guarantee a low VO2 max.
A skinny sedentary diver could have a low VO2max as well, but would be
unlikely to get one as low as his obese and sedentary
counterpart----however, enough smoking and drinking could help this along.

I have said that a very fat diver, who trains cardio really hard, for many
months, could have a VO2 max that is not much below the "average " value for
untrainied Americans (40ml/kg). This will put them much closer to standard
tables on shorter duration trimix dives, even to 250 feet. But once longer
durations cause helium to saturate the slow compartments ( the large "helium
sink, of fatty tissue"), much longer stops will be called for. We may even
see that where duration MUST last for 20 or 25 minutes, at depths up to 170
feet, air may have  exponentially  less DCS risk for the obese diver. And
this may help pave the way for the "TDI school of Intelligent  Drunk
Driving", and this may well become the permanent "niche" of the heavy diver.
This is not to say I endorse this, I'm just saying this could be a result of
extensive testing----and how the overweight market decides to react to it.

Dan



>dan
>this prove absolutly nothing. i am sure that they have seen guys like this
get
>bent & they might actually be fat out of shape guys. does that mean that
ALL
>FAT PEOPLE have have poor crdiovascular rates & the ALL of them are out of
>shape & ALL of them
>WILL come up screaming from a dive.
>you must start to realise how narrowminded your arguments on this are
getting.
>i have seen fat, skinny, inbeteweenies, men & women get bent on dives that
you
>would think were non dives & conversly i have seen the oposite occur on
deep
>tech dives. the point here is dan you have no point other than to blow your
>own horn on how great is your conditioning & that means that everyone else
>should FIT into your mold. because of course you must be perfect.
>well dan sorry to tell you this but we live in an imperfect world & for all
of
>your models of divers i can show you the oposite numebers of divers that
dove
>successfully.
>
>as far as the chest beating part of your post that you were able to do a
_____
>dive for X min & the do Y dive & got out of the water in B min....... So
what!
>i have seen guys dive to 180 for 30 twice in a day &  come up when the "air
>ran oiut so it was time to come up" . eventually all of them got bent, not
>that day but on other days. in those days they were only diving air now we
use
>other gasses to assist us in avoiding the bends & they also if you push it
>will get you out of the water much sooner. so your example only shows me
that
>you are interested in trying to impress us more than you are tring to make
a
>point.
>
>remember i am not against your concept but i just can't agree with all of
your
>conclusion. BTW i think you should take Capt Zero up  on the challange -
hell
>you will get a chance to dive some really great wrecks at the same time.
>
>hank
>
>In a message dated 98-03-06 11:33:40 EST, you write:
>
><< Subj: Re: Why Obesity in deep tech diving is a contraindication---gas
>exchange, revi
> Date: 98-03-06 11:33:40 EST
> From: dlv@ga*.ne* (Dan Volker)
> To: CAPTZEROOO@ao*.co* (CAPTZEROOO), tae@pe*.ne*
> CC: techdiver@aquanaut.com, TOM.MOUNT@wo*.at*.ne*,
>brownies@ne*.ne*, wwm@sa*.ne*, GIRVINE@bl*.ne*
>
>
>
>
>
> >Dan
> >
> >Where do you come up with these ridiculus figures  ??
> >
> >A fat guy needing 4-5 hours of deco vrs a fit guy needing 1 !!! If this
was
> >anywhere near true All fat divers would be bent on every decompression
> dive.
> >Fat takes up & releases inert gasses slower true !! but 5 times the deco
> for
> >the fat guy is wayyyyy off base.
>
> You need to talk to the WKPP guys about the human pretzels they
> see----typically very fat guys with poor aerobic base.  The fat guys will
do
> twice the deco the WKPP guys do, and be sceaming in pain after their dive.
> Ask Bill Mee or George.   On their last revovery attempt dive here,
George,
> Bill, and Robert did 250 for about 24 minuts, and did deco for 45 minutes.
> And this was a working dive.  The obese, sedentary divers would NOT be
able
> to do this profile without major pretzelling------and then after this
dive,
> we all went to dive the hole in the Wall, a cave dive on a ledge---ave
depth
> about 140, for like 30 minutes. We did about 20 minutes of deco and we
were
> out.
>
>
> Regards,
> Dan
>
>
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> From: "Dan Volker" <dlv@ga*.ne*>
> To: "CAPTZEROOO" <CAPTZEROOO@ao*.co*>, <tae@pe*.ne*>
> Cc: <techdiver@aquanaut.com>, <TOM.MOUNT@wo*.at*.ne*>,
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>exchange, revi
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