Need help with Scuba science.

"Kurt" <allez@att.net> wrote in message
news:PJYGh.36927$as2.32075@bgtnsc05-news.ops.worldnet.att.net...
> Sheldon wrote:
>> Okay. I can't dive down much below the surface of the pool unless I
>> exhale because I'm too buoyant. If I exhale I'll go right down, but I
>> can't seem to exhale and hold my breath so I freak out and need to come
>> right up. Based on the info I've been reading if I take a few deep
>> breaths I should be able to exhale and go right down. Seems "science"
>> says that it's too much CO2 that makes you want to take a breath. Build
>> up your oxygen and you shouldn't feel the need to breath until your CO2
>> builds up again.
>>
>> Now, if I do this I still want to take a breath when I go down. Is this
>> just a psychological thing because it's more normal for a person to
>> inhale to hold their breath than exhale? Or, is my science all screwed
>> up?
>
> If I exhale first, I'm good for less than 10 seconds. Science or not, you
> can stay down a LOT longer with a full lung.
>
> Once you get a few feet down, water pressure will compress your body
> and help you stay there. If you haven't tried this, try rolling over
> so that your legs are totally out of the water as you dive. Once you
> get down about 10 feet you should notice it's a lot easier to stay there.

I'll give it a try. Thanks.

"Kari" <karibelle2001@yahoo.com> wrote in message
news:1173140023.456110.113790@64g2000cwx.googlegro ups.com...
> On Mar 4, 1:37 pm, "Douglas W \"Popeye\" Frederick"
> <Pop...@finalprotectivefire.com> wrote:
>> "Lee Bell" <pleeb...@bellsouth.net> wrote in message
>>
>> news:BUFGh.8178$68.2976@bignews8.bellsouth.net...
>>
>> > Sheldon wrote
>>
>> >> Thanks. And since I don't have "breasts," and I'm not overweight, I'm
>> >> sure that's not the problem.
>>
>> > The issue is not your weight, but the proportion of fat to other
>> > tissues.
>> > Fat floats, bone and muscle don't. If you float, you've got enough fat
>> > to
>> > more than offset the negative bone and muscle. Most people are
>> > buoyant,
>> > some more than others. Only a few are negative.
>>
>> I can float with a six-pack on my chest, and keep my face above water.
>>
>> Fact.
>
>
> And dealing with the six-pack gives one something to do during the ten
> minute float.



How was your vaca?