Re: So, I got my OW Cert


"John Hanson" <jhanson@xxxxxxxxxxxxxxxxx> wrote in message
news:vn0282t8473hgueeaq69glood0io9jkn3j@xxxxxxxxxx
On Fri, 2 Jun 2006 22:29:58 -0400, "Lee Bell"
<pleebell2@xxxxxxxxxxxxx> wrote in rec.scuba:

"Dennis (Icarus)" wrote

It does seem to me that the only factors governing air consumption
would
be
how many times you breathe, and the volume of air inhaled.
Now, other factors may be related as to why one person breaths 18 times
a
min, vs anothe who only breaths 12 times a minute (presuming the same
volume).

One is relaxed and calm, the other isn't. Simple, no?

Again, most all untrained men (or women when comparing people of the
same sex) of a similar height will possess nearly the same amount of
bio-active tissue whether they are 150 pounds and lean or 200 pounds
and fat (fat is not very bio-active). They will require the same
amount of oxygen. A heavily muscled
weightlifter/powerlifter/bodybuilder will require nearly double that
or more just at rest.

Again, we have the basal metabolic rate. That rate spikes in the
trained lifter for about 24 hours after a workout. In comparison, a
runner will only have that spike for about 1-2 hours after his
workout. This is a biologic fact and also why it is so important to
do strength training when trying to cut fat (it's far more important
than cardiovascular training) because strength training forces your
body to hang onto the muscle, which is the first thing it wants to
give up in a caloric deficient (in a survival situation, fat is more
important than muscle). So yes, you can burn calories being a couch
potato for up to a day after a serious strength workout, but I
digress.

Getting back to that breathing thing, this increased metabolic rate is
due to the body trying to rebuild the muscle that was broken down in
the last training session. It also takes place due to cellular
breakdown that occurs all the time in all animals but it is greatly
increased after a strenuous strength training session. During this
time, the oxygen consumption increases as well as carbon dioxide
expiration. Hence, you'll use more air. I would also posit that a
weightlifter or a powerlifter would have a higher BMR/Training time
ratio than a bodybuilder due to their different training criteria but
again, I digress.

So, when you say that the whole large body-muscle mass/air consumption
is irrelevant, I say you don't have a clue. BTW, during my fun dive,
the 6'3"+, 350 pound+ experienced diver was the first and only one to
start running low on air yesterday. Which brings up another point:

The largest sperm whale on this planet is far more comfortable in the
water than any of you people and has far more dive experience than ALL
of you put together. On top of that, his lungs are 4 times better at
using the oxygen that he does inhale. Why is it that he takes into
his lungs more air in one breath than you do for your whole dive?
Answer me that one!

Firstly because it's lungs are that much larger than ours. Secondly because
it's going to use that single breath for it's entire dive which may last up
to 1 hour and reach a depth of 10,500 feet. I'd guess that if you were
planning on diving to 10,500 feet, you'd probably want to take along a bit
more than the standard of 80 cf of air.


.

Relevant Pages

  • Re: kind of new to this
    ... not translate directly to the amount of air, ... have developed more muscle mass tend to be more fit. ... I use exactly one breath of air during the lift (you ...
    (rec.scuba)
  • Re: So, I got my OW Cert
    ... vs anothe who only breaths 12 times a minute (presuming the same ... do strength training when trying to cut fat (it's far more important ... important than muscle). ... Hence, you'll use more air. ...
    (rec.scuba)
  • Re: Breathing Technique
    ... So if they can hold onto the air for a moment, they will ride a little bit higher overall during their stroke cycle. ... The difference in buoyancy between the case of exhaling continuously and the case of exhaling in a short burst can't be all that great, given that for the first half of the exhale the lungs are relatively full. ... If the body is correctly positioned, I think the time to overcome the inertia to start sinking would be significant, maybe longer than the time to start the next breath. ... It is the forceful exhalation that I have a problem executing. ...
    (rec.sport.swimming)
  • Re: kind of new to this
    ... I use exactly one breath of air during the lift (you ... we hold our breathes during the lift in order to generate as much ... He mentioned more than once that our air consumption would drop ... people and those with a lot of muscle mass as well as your smokers. ...
    (rec.scuba)
  • Re: kind of new to this
    ... the amount of air that'd be drawn through the regulator (a ... So its not necessarily more muscle mass in your example, but lung size ... is a powerlifter and one is mildly active. ... More volume is exchanged on every breath. ...
    (rec.scuba)
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