[CQ-Contest] Sleep Deprivation

[James Neiger]

What the study does NOT appear to do is address the AGE of the participants.
Intuitively, and from my own experiences, I would think caffeine would make
a difference, say @ Hour 24 for a 62 year old, whereas I expect these being
combat troops, most likely the study done for guys less than half that age.

Or, have I missed something there?

 I know from my own experiences, a couple of  200mg caffeine pills during
the 2nd 24, really jump starts my battery.

Vy 73

Jim Neiger
N6TJ
----- Original Message -----
From: "Mike Gilmer - N2MG" <n2mg at contesting.com>
To: <cq-contest at contesting.com>
Sent: Friday, October 05, 2001 5:01 AM
Subject: Re: [CQ-Contest] Sleep Deprivation


>
> I don't know...It is a confusing graph and set of
> captions/words.
>
> Since there are separate lines (black and red) for
> caffeine and non-caffeine BEFORE the 48hour point,
> that tells me that they we administering caffeine all
> along. The result being that little benefit was gained
> from the caffeine prior to the pre-48-hour point.
>
> However on another page, it says, "we established that
> a single dose of caffeine (300-600 mg; the equivalent
> of 3-6 cups of brewed coffee) can improve performance
> for 10-12 hours after 48 hours without sleep"
>
> This seems to imply that no caffeine was administered prior to teh 48-hr
point.  So why the separate graph
> lines (red and black) prior to 48 hours?
>
> Mike N2MG
>
>
> On Thu, 04 October 2001, Sylvan Katz wrote:
>
> >
> >
> > >http://wrair-www.army.mil/depts/behavbio/caf2.gif
> > >
> > > which for those who can't be bothered to click on it, shows that for
48
> > > hours at least, a placebo worked as well as caffeine....
> > >
> > > 73s Tim EI8IC
> >
> >
> > Ooops - that is not the way I read the graph.
> >
> > The graph seems to say that if 600 mg of caffeine is administer after 48
> > hours of sleep deprivation (note the arrow to the 48 hours mark under
the
> > legend) those that receive caffeine exhibited a significant increase in
> > throughput (about 25% increase) for the next 10-12 hours compared to the
> > placebo group.
> >
> > In fact in the text the researchers say:
> > "In a search for a safe, effective stimulant to sustain performance when
> > sleep is not possible due to operational reasons, we established that a
> > single dose of caffeine (300-600 mg; the equivalent of 3-6 cups of
brewed
> > coffee) can improve performance for 10-12 hours after 48 hours without
sleep
> > (see figure: Caffeine after 48 Hours of Sleep Deprivation: Performance
on
> > Serial Addition/Subtraction). Caffeine, in tablet form, is currently
> > considered the drug of choice for the stimulant to sustain performance
> > component of the Sleep Management System."
> >
> > This restores my faith in a couple of good cups of Java during a contest
:-)
> >
> > .. sylvan
>
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