Dan:

Please site where these stats on overwieght divers bending easier can be found.
I think there coud be some truth to your concepts, but you are exaggeratting the
magnitude.

Simply, if a fat diver with poor circulayion to slow tissues off gasses slower
than a slim diver with better circulation to slow tissues, then didn't the fat
diver not on gas as much gas in those tissues in the first place?

Also, is VO2 max a reliable measure of inert gas to slow tissue delivery as it
is a measure of oxygen to slow tissue delivery?

Tom

Dan Volker wrote:

> There still seems to be too much controversy over fitness standards needing
> to be created. This can only stem from a misunderstanding by many of the
> unfit divers, as to "WHY" they are at risk. My example below, is another
> attempt to explain the concept.  Anyone else want to jump in to this?
>
> Ability to exchange gasses faster, as in an elite level athlete with a high
> VO2 max, will translate into exposing more blood in the body, to the
> gradient in the lungs, in a given period of time. This could translate into
> a cross country skiing ( they traditionally have the highest VO2 max scores
> of any Olympic athletes) tech diver having the ability to offgas helium and
> nitrogen almost 4 to 5 times as fast as an obese  diver would be capable of.
> Since the effects of hypothermia and the challenge of supporting a tech
> diver begin to become more pronounced after several hours of deco, this will
> make a huge difference, if the elite diver
> needs a full hour to do deco from a 270  foot dive, for 23
> minutes. The fat diver may find even more deco obligation than five times
> the athlete's , because his longer stop requirements ( say 5 times as long
> at each stop) at 180, 170, etc., will
> incur more deco obligation from the deep deco part of the dive----they will
> have to do more deco, just from their deep deco stops alone. This could
> create exponential increases in deco time at 50, 40, 30, 20, and 10 foot
> stops.  Instead of this being 4-5  hours of deco , as would be suggested by
> their slower gas exchange rate ( versus the 1 hour for the
> athlete), they may "really" need 10 hours or even more.  Statistics on fat
> tech divers
> getting bent after deep long duration dives are horrifying, giving much
> credence to these
> ideas here.
> Dan
>
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