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>
>On Tue, 13 Dec 94 12:18:22 GMT J Shepherd wrote:
>
> Does this mean that if you run out of air @ depth & if you don't
>breath (obviously), if you have a 'will of iron' you will feel like shit, but
>won't blackout due to O2 starvation as quickly at depth as on the surface ???
>
Probably an associative cause of shallow water blackout ...
> I once held my breath for 3 mins....relaxed & sitting in an armchair.
>"Why ?" you may well ask. I'm not sure I have a good answer, apart from just
>seeing if I could. It felt pretty awful & I would have hated to even do 1
minute
>underwater. (I'm sure we will now have a flood of people saying they can do
it
>for even longer... :-) )
>
I once met an instructor at DEMA who told me that he was usually able
to get all of his students to pass 2 minutes breath holding in a pool.
All it took was patience and practice. Most people have a lot more
capacity than they believe.
>under water in a swimming pool was 7 minutes (!) I presume that in doing this
>the 'pain barrier' of CO2 build-up is overcome & that the real limitation is
O2
>blackout. If so, could the same person hold his breath for 28 minutes @ 30
>metres, where the ppO2 is 0.8 bar. This doesn't seem likely ..!! Hence are
you
>correct in your original supposition or are there other factors to be
>considered ?
>
There are other factors. I am not sure what they are. But it seems
clear from my efforts that the lower levels of breath hold capacity
(under three and a half minutes) are available to nearly everyone.
Steve
> Regards, Steve M.
>
- Stephen M. Dodd, Computer Systems Coordinator ~~~~~~~~~~~~~~~~~~~~~~~~~
Oregon State University Extension Service
sdodd@oe*.or*.ed* Internet Oregon State University
Voice 503-737-3550 FAX 503-737-4423 Corvallis, OR 97331
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