"Uncle Peter" wrote in message
news
On Fri, 31 Oct 2014 11:50:56 -0000, Bod wrote:

On 31/10/2014 11:46, Uncle Peter wrote:
On Fri, 31 Oct 2014 07:05:33 -0000, Rod Speed
wrote:

Bod wrote

Uncle Peter made this incredible statement:

"This is a fact. -20C air does not make you cold, .
You might shiver if you were naked, but the
shivering will stop you getting any colder".

To me, it sounds like he's talking absolute bull****
and he should be sent to the funny farm, but is
there an element of truth in what he said?....

Nope. Its certainly possible to be quite active when
naked in -20C air and do fine, but just standing there
naked and shivering wont let you survive for long.

Active or not it doesn't matter. Shivering replaces active, it's the
same thing, your muscles are moving. You also have reduced blood flow
to the surface (all of you, not just your fingers and toes and other
sticky out things), and brown fat cells which generate heat directly
from calories.

Yup, which leads to frostbite on your extremities.

Your body won't allow that if you have a reasonably fit body.

Bull****. Happens all the time with the extremely fit on Everest etc.

I've gone hillwalking barefoot in the snow.

Try climbing Everest in bare feet and see how long your toes last.

My feet go cold and numb at first, then eventually they go red and warm up
again.

Didn't happen with those that got frostbite on Everest.